diff --git a/OptimizelySDK.Tests/EventTests/EventBuilderTest.cs b/OptimizelySDK.Tests/EventTests/EventBuilderTest.cs
index c869d831..8b4c3ad5 100644
--- a/OptimizelySDK.Tests/EventTests/EventBuilderTest.cs
+++ b/OptimizelySDK.Tests/EventTests/EventBuilderTest.cs
@@ -115,7 +115,7 @@ public void TestCreateImpressionEventNoAttributes()
                 { "anonymize_ip", false },
             };
 
-            var expectedLogEvent = new LogEvent("https://logx.optimizely.com/v1/events",
+            var expectedLogEvent = new LogEvent(EventFactory.EventEndpoints["US"],
                 payloadParams,
                 "POST",
                 new Dictionary<string, string>
@@ -207,7 +207,7 @@ public void TestCreateImpressionEventWithAttributes()
                 { "anonymize_ip", false },
             };
 
-            var expectedLogEvent = new LogEvent("https://logx.optimizely.com/v1/events",
+            var expectedLogEvent = new LogEvent(EventFactory.EventEndpoints["US"],
                 payloadParams,
                 "POST",
                 new Dictionary<string, string>
@@ -327,7 +327,7 @@ public void TestCreateImpressionEventWithTypedAttributes()
                 { "anonymize_ip", false },
             };
 
-            var expectedLogEvent = new LogEvent("https://logx.optimizely.com/v1/events",
+            var expectedLogEvent = new LogEvent(EventFactory.EventEndpoints["US"],
                 payloadParams,
                 "POST",
                 new Dictionary<string, string>
@@ -441,7 +441,7 @@ public void TestCreateImpressionEventRemovesInvalidAttributesFromPayload()
                 { "anonymize_ip", false },
             };
 
-            var expectedLogEvent = new LogEvent("https://logx.optimizely.com/v1/events",
+            var expectedLogEvent = new LogEvent(EventFactory.EventEndpoints["US"],
                 payloadParams,
                 "POST",
                 new Dictionary<string, string>
@@ -531,7 +531,7 @@ public void TestCreateConversionEventNoAttributesNoValue()
             };
 
             var expectedEvent = new LogEvent(
-                "https://logx.optimizely.com/v1/events",
+                EventFactory.EventEndpoints["US"],
                 payloadParams,
                 "POST",
                 new Dictionary<string, string>
@@ -617,7 +617,7 @@ public void TestCreateConversionEventWithAttributesNoValue()
             };
 
             var expectedEvent = new LogEvent(
-                "https://logx.optimizely.com/v1/events",
+                EventFactory.EventEndpoints["US"],
                 payloadParams,
                 "POST",
                 new Dictionary<string, string>
@@ -709,7 +709,7 @@ public void TestCreateConversionEventNoAttributesWithValue()
             };
 
             var expectedEvent = new LogEvent(
-                "https://logx.optimizely.com/v1/events",
+                EventFactory.EventEndpoints["US"],
                 payloadParams,
                 "POST",
                 new Dictionary<string, string>
@@ -809,7 +809,7 @@ public void TestCreateConversionEventWithAttributesWithValue()
             };
 
             var expectedEvent = new LogEvent(
-                "https://logx.optimizely.com/v1/events",
+                EventFactory.EventEndpoints["US"],
                 payloadParams,
                 "POST",
                 new Dictionary<string, string>
@@ -909,7 +909,7 @@ public void TestCreateConversionEventNoAttributesWithInvalidValue()
             };
 
             var expectedEvent = new LogEvent(
-                "https://logx.optimizely.com/v1/events",
+                EventFactory.EventEndpoints["US"],
                 payloadParams,
                 "POST",
                 new Dictionary<string, string>
@@ -1003,7 +1003,7 @@ public void TestConversionEventWithNumericTag()
             };
 
             var expectedEvent = new LogEvent(
-                "https://logx.optimizely.com/v1/events",
+                EventFactory.EventEndpoints["US"],
                 payloadParams,
                 "POST",
                 new Dictionary<string, string>
@@ -1096,7 +1096,7 @@ public void TestConversionEventWithFalsyNumericAndRevenueValues()
             };
 
             var expectedEvent = new LogEvent(
-                "https://logx.optimizely.com/v1/events",
+                EventFactory.EventEndpoints["US"],
                 payloadParams,
                 "POST",
                 new Dictionary<string, string>
@@ -1189,7 +1189,7 @@ public void TestConversionEventWithNumericValue1()
             };
 
             var expectedEvent = new LogEvent(
-                "https://logx.optimizely.com/v1/events",
+                EventFactory.EventEndpoints["US"],
                 payloadParams,
                 "POST",
                 new Dictionary<string, string>
@@ -1282,7 +1282,7 @@ public void TestConversionEventWithRevenueValue1()
             };
 
             var expectedEvent = new LogEvent(
-                "https://logx.optimizely.com/v1/events",
+                EventFactory.EventEndpoints["US"],
                 payloadParams,
                 "POST",
                 new Dictionary<string, string>
@@ -1381,7 +1381,7 @@ public void TestCreateConversionEventWithBucketingIDAttribute()
             };
 
             var expectedEvent = new LogEvent(
-                "https://logx.optimizely.com/v1/events",
+                EventFactory.EventEndpoints["US"],
                 payloadParams,
                 "POST",
                 new Dictionary<string, string>
@@ -1487,7 +1487,7 @@ public void TestCreateImpressionEventWithBucketingIDAttribute()
                 { "anonymize_ip", false },
             };
 
-            var expectedLogEvent = new LogEvent("https://logx.optimizely.com/v1/events",
+            var expectedLogEvent = new LogEvent(EventFactory.EventEndpoints["US"],
                 payloadParams,
                 "POST",
                 new Dictionary<string, string>
@@ -1587,7 +1587,7 @@ public void TestCreateImpressionEventWhenBotFilteringIsProvidedInDatafile()
                 { "anonymize_ip", false },
             };
 
-            var expectedLogEvent = new LogEvent("https://logx.optimizely.com/v1/events",
+            var expectedLogEvent = new LogEvent(EventFactory.EventEndpoints["US"],
                 payloadParams,
                 "POST",
                 new Dictionary<string, string>
@@ -1680,7 +1680,7 @@ public void TestCreateImpressionEventWhenBotFilteringIsNotProvidedInDatafile()
                 { "anonymize_ip", false },
             };
 
-            var expectedLogEvent = new LogEvent("https://logx.optimizely.com/v1/events",
+            var expectedLogEvent = new LogEvent(EventFactory.EventEndpoints["US"],
                 payloadParams,
                 "POST",
                 new Dictionary<string, string>
@@ -1770,7 +1770,7 @@ public void TestCreateConversionEventWhenBotFilteringIsProvidedInDatafile()
             };
 
             var expectedEvent = new LogEvent(
-                "https://logx.optimizely.com/v1/events",
+                EventFactory.EventEndpoints["US"],
                 payloadParams,
                 "POST",
                 new Dictionary<string, string>
@@ -1856,7 +1856,7 @@ public void TestCreateConversionEventWhenBotFilteringIsNotProvidedInDatafile()
             };
 
             var expectedEvent = new LogEvent(
-                "https://logx.optimizely.com/v1/events",
+                EventFactory.EventEndpoints["US"],
                 payloadParams,
                 "POST",
                 new Dictionary<string, string>
@@ -1989,7 +1989,7 @@ public void TestCreateConversionEventWhenEventUsedInMultipleExp()
 
 
             var expectedLogEvent = new LogEvent(
-                "https://logx.optimizely.com/v1/events",
+                EventFactory.EventEndpoints["US"],
                 payloadParams,
                 "POST",
                 new Dictionary<string, string>
@@ -2082,7 +2082,7 @@ public void TestCreateConversionEventRemovesInvalidAttributesFromPayload()
             };
 
             var expectedEvent = new LogEvent(
-                "https://logx.optimizely.com/v1/events",
+                EventFactory.EventEndpoints["US"],
                 payloadParams,
                 "POST",
                 new Dictionary<string, string>
diff --git a/OptimizelySDK.Tests/EventTests/EventFactoryTest.cs b/OptimizelySDK.Tests/EventTests/EventFactoryTest.cs
index 3199a8ae..8c839d67 100644
--- a/OptimizelySDK.Tests/EventTests/EventFactoryTest.cs
+++ b/OptimizelySDK.Tests/EventTests/EventFactoryTest.cs
@@ -66,6 +66,208 @@ public void
             Assert.IsNull(impressionEvent);
         }
 
+        [Test]
+        public void TestCreateImpressionEventNoAttributesEU()
+        {
+            var guid = Guid.NewGuid();
+            var timeStamp = TestData.SecondsSince1970();
+
+            var payloadParams = new Dictionary<string, object>
+            {
+                {
+                    "visitors", new object[]
+                    {
+                        new Dictionary<string, object>()
+                        {
+                            {
+                                "snapshots", new object[]
+                                {
+                                    new Dictionary<string, object>
+                                    {
+                                        {
+                                            "decisions", new object[]
+                                            {
+                                                new Dictionary<string, object>
+                                                {
+                                                    { "campaign_id", "7719770039" },
+                                                    { "experiment_id", "7716830082" },
+                                                    { "variation_id", "7722370027" },
+                                                    {
+                                                        "metadata",
+                                                        new Dictionary<string, object>
+                                                        {
+                                                            { "rule_type", "experiment" },
+                                                            { "rule_key", "test_experiment" },
+                                                            { "flag_key", "test_experiment" },
+                                                            { "variation_key", "control" },
+                                                            { "enabled", false },
+                                                        }
+                                                    },
+                                                },
+                                            }
+                                        },
+                                        {
+                                            "events", new object[]
+                                            {
+                                                new Dictionary<string, object>
+                                                {
+                                                    { "entity_id", "7719770039" },
+                                                    { "timestamp", timeStamp },
+                                                    { "uuid", guid },
+                                                    { "key", "campaign_activated" },
+                                                },
+                                            }
+                                        },
+                                    },
+                                }
+                            },
+                            {
+                                "attributes", new object[]
+                                {
+                                    new Dictionary<string, object>
+                                    {
+                                        { "entity_id", ControlAttributes.BOT_FILTERING_ATTRIBUTE },
+                                        { "key", ControlAttributes.BOT_FILTERING_ATTRIBUTE },
+                                        { "type", "custom" },
+                                        { "value", true },
+                                    },
+                                }
+                            },
+                            { "visitor_id", TestUserId },
+                        },
+                    }
+                },
+                { "project_id", "7720880029" },
+                { "account_id", "1592310167" },
+                { "enrich_decisions", true },
+                { "client_name", "csharp-sdk" },
+                { "client_version", Optimizely.SDK_VERSION },
+                { "revision", "15" },
+                { "anonymize_ip", false },
+            };
+
+            var expectedLogEvent = new LogEvent(EventFactory.EventEndpoints["EU"],
+                payloadParams,
+                "POST",
+                new Dictionary<string, string>
+                {
+                    { "Content-Type", "application/json" },
+                });
+
+            Config.Region = "EU";
+            var impressionEvent = UserEventFactory.CreateImpressionEvent(
+                Config, Config.GetExperimentFromKey("test_experiment"), "7722370027", TestUserId,
+                null, "test_experiment", "experiment");
+
+            var logEvent = EventFactory.CreateLogEvent(impressionEvent, Logger);
+
+            TestData.ChangeGUIDAndTimeStamp(expectedLogEvent.Params, impressionEvent.Timestamp,
+                Guid.Parse(impressionEvent.UUID));
+
+            Assert.IsTrue(TestData.CompareObjects(expectedLogEvent, logEvent));
+        }
+
+        [Test]
+        public void TestCreateImpressionEventNoAttributesInvalid()
+        {
+            var guid = Guid.NewGuid();
+            var timeStamp = TestData.SecondsSince1970();
+
+            var payloadParams = new Dictionary<string, object>
+            {
+                {
+                    "visitors", new object[]
+                    {
+                        new Dictionary<string, object>()
+                        {
+                            {
+                                "snapshots", new object[]
+                                {
+                                    new Dictionary<string, object>
+                                    {
+                                        {
+                                            "decisions", new object[]
+                                            {
+                                                new Dictionary<string, object>
+                                                {
+                                                    { "campaign_id", "7719770039" },
+                                                    { "experiment_id", "7716830082" },
+                                                    { "variation_id", "7722370027" },
+                                                    {
+                                                        "metadata",
+                                                        new Dictionary<string, object>
+                                                        {
+                                                            { "rule_type", "experiment" },
+                                                            { "rule_key", "test_experiment" },
+                                                            { "flag_key", "test_experiment" },
+                                                            { "variation_key", "control" },
+                                                            { "enabled", false },
+                                                        }
+                                                    },
+                                                },
+                                            }
+                                        },
+                                        {
+                                            "events", new object[]
+                                            {
+                                                new Dictionary<string, object>
+                                                {
+                                                    { "entity_id", "7719770039" },
+                                                    { "timestamp", timeStamp },
+                                                    { "uuid", guid },
+                                                    { "key", "campaign_activated" },
+                                                },
+                                            }
+                                        },
+                                    },
+                                }
+                            },
+                            {
+                                "attributes", new object[]
+                                {
+                                    new Dictionary<string, object>
+                                    {
+                                        { "entity_id", ControlAttributes.BOT_FILTERING_ATTRIBUTE },
+                                        { "key", ControlAttributes.BOT_FILTERING_ATTRIBUTE },
+                                        { "type", "custom" },
+                                        { "value", true },
+                                    },
+                                }
+                            },
+                            { "visitor_id", TestUserId },
+                        },
+                    }
+                },
+                { "project_id", "7720880029" },
+                { "account_id", "1592310167" },
+                { "enrich_decisions", true },
+                { "client_name", "csharp-sdk" },
+                { "client_version", Optimizely.SDK_VERSION },
+                { "revision", "15" },
+                { "anonymize_ip", false },
+            };
+
+            var expectedLogEvent = new LogEvent(EventFactory.EventEndpoints["US"],
+                payloadParams,
+                "POST",
+                new Dictionary<string, string>
+                {
+                    { "Content-Type", "application/json" },
+                });
+
+            Config.Region = "ZZ";
+            var impressionEvent = UserEventFactory.CreateImpressionEvent(
+                Config, Config.GetExperimentFromKey("test_experiment"), "7722370027", TestUserId,
+                null, "test_experiment", "experiment");
+
+            var logEvent = EventFactory.CreateLogEvent(impressionEvent, Logger);
+
+            TestData.ChangeGUIDAndTimeStamp(expectedLogEvent.Params, impressionEvent.Timestamp,
+                Guid.Parse(impressionEvent.UUID));
+
+            Assert.IsTrue(TestData.CompareObjects(expectedLogEvent, logEvent));
+        }
+
         [Test]
         public void TestCreateImpressionEventNoAttributes()
         {
@@ -146,7 +348,7 @@ public void TestCreateImpressionEventNoAttributes()
                 { "anonymize_ip", false },
             };
 
-            var expectedLogEvent = new LogEvent("https://logx.optimizely.com/v1/events",
+            var expectedLogEvent = new LogEvent(EventFactory.EventEndpoints["US"],
                 payloadParams,
                 "POST",
                 new Dictionary<string, string>
@@ -251,7 +453,7 @@ public void TestCreateImpressionEventWithAttributes()
                 { "anonymize_ip", false },
             };
 
-            var expectedLogEvent = new LogEvent("https://logx.optimizely.com/v1/events",
+            var expectedLogEvent = new LogEvent(EventFactory.EventEndpoints["US"],
                 payloadParams,
                 "POST",
                 new Dictionary<string, string>
@@ -383,7 +585,7 @@ public void TestCreateImpressionEventWithTypedAttributes()
                 { "anonymize_ip", false },
             };
 
-            var expectedLogEvent = new LogEvent("https://logx.optimizely.com/v1/events",
+            var expectedLogEvent = new LogEvent(EventFactory.EventEndpoints["US"],
                 payloadParams,
                 "POST",
                 new Dictionary<string, string>
@@ -509,7 +711,7 @@ public void TestCreateImpressionEventRemovesInvalidAttributesFromPayload()
                 { "anonymize_ip", false },
             };
 
-            var expectedLogEvent = new LogEvent("https://logx.optimizely.com/v1/events",
+            var expectedLogEvent = new LogEvent(EventFactory.EventEndpoints["US"],
                 payloadParams,
                 "POST",
                 new Dictionary<string, string>
@@ -642,7 +844,7 @@ public void TestCreateImpressionEventRemovesInvalidAttributesFromPayloadRollout(
                 { "anonymize_ip", false },
             };
 
-            var expectedLogEvent = new LogEvent("https://logx.optimizely.com/v1/events",
+            var expectedLogEvent = new LogEvent(EventFactory.EventEndpoints["US"],
                 payloadParams,
                 "POST",
                 new Dictionary<string, string>
@@ -735,7 +937,170 @@ public void TestCreateConversionEventNoAttributesNoValue()
             };
 
             var expectedEvent = new LogEvent(
-                "https://logx.optimizely.com/v1/events",
+                EventFactory.EventEndpoints["US"],
+                payloadParams,
+                "POST",
+                new Dictionary<string, string>
+                {
+                    { "Content-Type", "application/json" },
+                });
+            var experimentToVariationMap = new Dictionary<string, Variation>
+            {
+                { "7716830082", new Variation { Id = "7722370027", Key = "control" } },
+            };
+
+            var conversionEvent =
+                UserEventFactory.CreateConversionEvent(Config, "purchase", TestUserId, null, null);
+            var logEvent = EventFactory.CreateLogEvent(conversionEvent, Logger);
+
+            TestData.ChangeGUIDAndTimeStamp(expectedEvent.Params, conversionEvent.Timestamp,
+                Guid.Parse(conversionEvent.UUID));
+
+            Assert.IsTrue(TestData.CompareObjects(expectedEvent, logEvent));
+        }
+
+        [Test]
+        public void TestCreateConversionEventNoAttributesNoValueEU()
+        {
+            var guid = Guid.NewGuid();
+            var timeStamp = TestData.SecondsSince1970();
+
+            var payloadParams = new Dictionary<string, object>
+            {
+                {
+                    "visitors", new object[]
+                    {
+                        new Dictionary<string, object>
+                        {
+                            {
+                                "snapshots", new object[]
+                                {
+                                    new Dictionary<string, object>
+                                    {
+                                        {
+                                            "events", new object[]
+                                            {
+                                                new Dictionary<string, object>
+                                                {
+                                                    { "entity_id", "7718020063" },
+                                                    { "timestamp", timeStamp },
+                                                    { "uuid", guid },
+                                                    { "key", "purchase" },
+                                                },
+                                            }
+                                        },
+                                    },
+                                }
+                            },
+                            { "visitor_id", TestUserId },
+                            {
+                                "attributes", new object[]
+                                {
+                                    new Dictionary<string, object>
+                                    {
+                                        { "entity_id", ControlAttributes.BOT_FILTERING_ATTRIBUTE },
+                                        { "key", ControlAttributes.BOT_FILTERING_ATTRIBUTE },
+                                        { "type", "custom" },
+                                        { "value", true },
+                                    },
+                                }
+                            },
+                        },
+                    }
+                },
+                { "project_id", "7720880029" },
+                { "enrich_decisions", true },
+                { "account_id", "1592310167" },
+                { "client_name", "csharp-sdk" },
+                { "client_version", Optimizely.SDK_VERSION },
+                { "revision", "15" },
+                { "anonymize_ip", false },
+            };
+
+            var expectedEvent = new LogEvent(
+                EventFactory.EventEndpoints["EU"],
+                payloadParams,
+                "POST",
+                new Dictionary<string, string>
+                {
+                    { "Content-Type", "application/json" },
+                });
+            var experimentToVariationMap = new Dictionary<string, Variation>
+            {
+                { "7716830082", new Variation { Id = "7722370027", Key = "control" } },
+            };
+
+            Config.Region = "EU";
+            var conversionEvent =
+                UserEventFactory.CreateConversionEvent(Config, "purchase", TestUserId, null, null);
+            var logEvent = EventFactory.CreateLogEvent(conversionEvent, Logger);
+
+            TestData.ChangeGUIDAndTimeStamp(expectedEvent.Params, conversionEvent.Timestamp,
+                Guid.Parse(conversionEvent.UUID));
+
+            Assert.IsTrue(TestData.CompareObjects(expectedEvent, logEvent));
+        }
+
+        [Test]
+        public void TestCreateConversionEventNoAttributesNoValueInvalid()
+        {
+            var guid = Guid.NewGuid();
+            var timeStamp = TestData.SecondsSince1970();
+
+            var payloadParams = new Dictionary<string, object>
+            {
+                {
+                    "visitors", new object[]
+                    {
+                        new Dictionary<string, object>
+                        {
+                            {
+                                "snapshots", new object[]
+                                {
+                                    new Dictionary<string, object>
+                                    {
+                                        {
+                                            "events", new object[]
+                                            {
+                                                new Dictionary<string, object>
+                                                {
+                                                    { "entity_id", "7718020063" },
+                                                    { "timestamp", timeStamp },
+                                                    { "uuid", guid },
+                                                    { "key", "purchase" },
+                                                },
+                                            }
+                                        },
+                                    },
+                                }
+                            },
+                            { "visitor_id", TestUserId },
+                            {
+                                "attributes", new object[]
+                                {
+                                    new Dictionary<string, object>
+                                    {
+                                        { "entity_id", ControlAttributes.BOT_FILTERING_ATTRIBUTE },
+                                        { "key", ControlAttributes.BOT_FILTERING_ATTRIBUTE },
+                                        { "type", "custom" },
+                                        { "value", true },
+                                    },
+                                }
+                            },
+                        },
+                    }
+                },
+                { "project_id", "7720880029" },
+                { "enrich_decisions", true },
+                { "account_id", "1592310167" },
+                { "client_name", "csharp-sdk" },
+                { "client_version", Optimizely.SDK_VERSION },
+                { "revision", "15" },
+                { "anonymize_ip", false },
+            };
+
+            var expectedEvent = new LogEvent(
+                EventFactory.EventEndpoints["US"],
                 payloadParams,
                 "POST",
                 new Dictionary<string, string>
@@ -747,6 +1112,7 @@ public void TestCreateConversionEventNoAttributesNoValue()
                 { "7716830082", new Variation { Id = "7722370027", Key = "control" } },
             };
 
+            Config.Region = "ZZ";
             var conversionEvent =
                 UserEventFactory.CreateConversionEvent(Config, "purchase", TestUserId, null, null);
             var logEvent = EventFactory.CreateLogEvent(conversionEvent, Logger);
@@ -823,7 +1189,7 @@ public void TestCreateConversionEventWithAttributesNoValue()
             };
 
             var expectedEvent = new LogEvent(
-                "https://logx.optimizely.com/v1/events",
+                EventFactory.EventEndpoints["US"],
                 payloadParams,
                 "POST",
                 new Dictionary<string, string>
@@ -918,7 +1284,7 @@ public void TestCreateConversionEventNoAttributesWithValue()
             };
 
             var expectedEvent = new LogEvent(
-                "https://logx.optimizely.com/v1/events",
+                EventFactory.EventEndpoints["US"],
                 payloadParams,
                 "POST",
                 new Dictionary<string, string>
@@ -1020,7 +1386,7 @@ public void TestCreateConversionEventWithAttributesWithValue()
             };
 
             var expectedEvent = new LogEvent(
-                "https://logx.optimizely.com/v1/events",
+                EventFactory.EventEndpoints["US"],
                 payloadParams,
                 "POST",
                 new Dictionary<string, string>
@@ -1122,7 +1488,7 @@ public void TestCreateConversionEventNoAttributesWithInvalidValue()
             };
 
             var expectedEvent = new LogEvent(
-                "https://logx.optimizely.com/v1/events",
+                EventFactory.EventEndpoints["US"],
                 payloadParams,
                 "POST",
                 new Dictionary<string, string>
@@ -1218,7 +1584,7 @@ public void TestConversionEventWithNumericTag()
             };
 
             var expectedEvent = new LogEvent(
-                "https://logx.optimizely.com/v1/events",
+                EventFactory.EventEndpoints["US"],
                 payloadParams,
                 "POST",
                 new Dictionary<string, string>
@@ -1316,7 +1682,7 @@ public void TestConversionEventWithFalsyNumericAndRevenueValues()
             };
 
             var expectedEvent = new LogEvent(
-                "https://logx.optimizely.com/v1/events",
+                EventFactory.EventEndpoints["US"],
                 payloadParams,
                 "POST",
                 new Dictionary<string, string>
@@ -1412,7 +1778,7 @@ public void TestConversionEventWithNumericValue1()
             };
 
             var expectedEvent = new LogEvent(
-                "https://logx.optimizely.com/v1/events",
+                EventFactory.EventEndpoints["US"],
                 payloadParams,
                 "POST",
                 new Dictionary<string, string>
@@ -1507,7 +1873,7 @@ public void TestConversionEventWithRevenueValue1()
             };
 
             var expectedEvent = new LogEvent(
-                "https://logx.optimizely.com/v1/events",
+                EventFactory.EventEndpoints["US"],
                 payloadParams,
                 "POST",
                 new Dictionary<string, string>
@@ -1609,7 +1975,7 @@ public void TestCreateConversionEventWithBucketingIDAttribute()
             };
 
             var expectedEvent = new LogEvent(
-                "https://logx.optimizely.com/v1/events",
+                EventFactory.EventEndpoints["US"],
                 payloadParams,
                 "POST",
                 new Dictionary<string, string>
@@ -1727,7 +2093,7 @@ public void TestCreateImpressionEventWithBucketingIDAttribute()
                 { "anonymize_ip", false },
             };
 
-            var expectedLogEvent = new LogEvent("https://logx.optimizely.com/v1/events",
+            var expectedLogEvent = new LogEvent(EventFactory.EventEndpoints["US"],
                 payloadParams,
                 "POST",
                 new Dictionary<string, string>
@@ -1838,7 +2204,7 @@ public void TestCreateImpressionEventWhenBotFilteringIsProvidedInDatafile()
                 { "anonymize_ip", false },
             };
 
-            var expectedLogEvent = new LogEvent("https://logx.optimizely.com/v1/events",
+            var expectedLogEvent = new LogEvent(EventFactory.EventEndpoints["US"],
                 payloadParams,
                 "POST",
                 new Dictionary<string, string>
@@ -1945,7 +2311,7 @@ public void TestCreateImpressionEventWhenBotFilteringIsNotProvidedInDatafile()
                 { "anonymize_ip", false },
             };
 
-            var expectedLogEvent = new LogEvent("https://logx.optimizely.com/v1/events",
+            var expectedLogEvent = new LogEvent(EventFactory.EventEndpoints["US"],
                 payloadParams,
                 "POST",
                 new Dictionary<string, string>
@@ -2039,7 +2405,7 @@ public void TestCreateConversionEventWhenBotFilteringIsProvidedInDatafile()
             };
 
             var expectedEvent = new LogEvent(
-                "https://logx.optimizely.com/v1/events",
+                EventFactory.EventEndpoints["US"],
                 payloadParams,
                 "POST",
                 new Dictionary<string, string>
@@ -2128,7 +2494,7 @@ public void TestCreateConversionEventWhenBotFilteringIsNotProvidedInDatafile()
             };
 
             var expectedEvent = new LogEvent(
-                "https://logx.optimizely.com/v1/events",
+                EventFactory.EventEndpoints["US"],
                 payloadParams,
                 "POST",
                 new Dictionary<string, string>
@@ -2250,7 +2616,7 @@ public void TestCreateConversionEventWhenEventUsedInMultipleExp()
 
 
             var expectedLogEvent = new LogEvent(
-                "https://logx.optimizely.com/v1/events",
+                EventFactory.EventEndpoints["US"],
                 payloadParams,
                 "POST",
                 new Dictionary<string, string>
@@ -2358,7 +2724,7 @@ public void TestCreateConversionEventRemovesInvalidAttributesFromPayload()
             };
 
             var expectedEvent = new LogEvent(
-                "https://logx.optimizely.com/v1/events",
+                EventFactory.EventEndpoints["US"],
                 payloadParams,
                 "POST",
                 new Dictionary<string, string>
diff --git a/OptimizelySDK.Tests/EventTests/TestForwardingEventDispatcher.cs b/OptimizelySDK.Tests/EventTests/TestForwardingEventDispatcher.cs
index 01eca1ee..9b7cf533 100644
--- a/OptimizelySDK.Tests/EventTests/TestForwardingEventDispatcher.cs
+++ b/OptimizelySDK.Tests/EventTests/TestForwardingEventDispatcher.cs
@@ -18,7 +18,7 @@ public class TestForwardingEventDispatcher : IEventDispatcher
         public void DispatchEvent(LogEvent logEvent)
         {
             Assert.AreEqual(logEvent.HttpVerb, "POST");
-            Assert.AreEqual(logEvent.Url, EventFactory.EVENT_ENDPOINT);
+            Assert.AreEqual(logEvent.Url, EventFactory.EventEndpoints["US"]);
             IsUpdated = true;
         }
     }
diff --git a/OptimizelySDK.Tests/OptimizelyTest.cs b/OptimizelySDK.Tests/OptimizelyTest.cs
index 0adb57ec..034b4bc0 100644
--- a/OptimizelySDK.Tests/OptimizelyTest.cs
+++ b/OptimizelySDK.Tests/OptimizelyTest.cs
@@ -3490,7 +3490,7 @@ public void TestTrackListener(UserAttributes userAttributes, EventTags eventTags
             var variation =
                 Result<Variation>.NewResult(Config.GetVariationFromKey(experimentKey, variationKey),
                     DecisionReasons);
-            var logEvent = new LogEvent("https://logx.optimizely.com/v1/events",
+            var logEvent = new LogEvent(EventFactory.EventEndpoints["US"],
                 OptimizelyHelper.SingleParameter,
                 "POST", new Dictionary<string, string>());
 
diff --git a/OptimizelySDK/Config/DatafileProjectConfig.cs b/OptimizelySDK/Config/DatafileProjectConfig.cs
index cb248f8c..465b384a 100644
--- a/OptimizelySDK/Config/DatafileProjectConfig.cs
+++ b/OptimizelySDK/Config/DatafileProjectConfig.cs
@@ -103,7 +103,7 @@ public enum OPTLYSDKVersion
         public string Datafile { get; set; }
 
         /// <summary>
-        /// Configured host name for the Optimizely Data Platform. 
+        /// Configured host name for the Optimizely Data Platform.
         /// </summary>
         public string HostForOdp { get; private set; }
 
@@ -492,8 +492,7 @@ private static DatafileProjectConfig GetConfig(string configData)
                     !(((int)supportedVersion).ToString() == config.Version)))
             {
                 throw new ConfigParseException(
-                    $@"This version of the C# SDK does not support the given datafile version: {
-                        config.Version}");
+                    $@"This version of the C# SDK does not support the given datafile version: {config.Version}");
             }
 
             return config;
@@ -632,8 +631,7 @@ public Variation GetVariationFromKey(string experimentKey, string variationKey)
                 return _VariationKeyMap[experimentKey][variationKey];
             }
 
-            var message = $@"No variation key ""{variationKey
-            }"" defined in datafile for experiment ""{experimentKey}"".";
+            var message = $@"No variation key ""{variationKey}"" defined in datafile for experiment ""{experimentKey}"".";
             Logger.Log(LogLevel.ERROR, message);
             ErrorHandler.HandleError(
                 new InvalidVariationException("Provided variation is not in datafile."));
@@ -655,8 +653,7 @@ public Variation GetVariationFromKeyByExperimentId(string experimentId, string v
                 return _VariationKeyMapByExperimentId[experimentId][variationKey];
             }
 
-            var message = $@"No variation key ""{variationKey
-            }"" defined in datafile for experiment ""{experimentId}"".";
+            var message = $@"No variation key ""{variationKey}"" defined in datafile for experiment ""{experimentId}"".";
             Logger.Log(LogLevel.ERROR, message);
             ErrorHandler.HandleError(
                 new InvalidVariationException("Provided variation is not in datafile."));
@@ -678,8 +675,7 @@ public Variation GetVariationFromId(string experimentKey, string variationId)
                 return _VariationIdMap[experimentKey][variationId];
             }
 
-            var message = $@"No variation ID ""{variationId
-            }"" defined in datafile for experiment ""{experimentKey}"".";
+            var message = $@"No variation ID ""{variationId}"" defined in datafile for experiment ""{experimentKey}"".";
             Logger.Log(LogLevel.ERROR, message);
             ErrorHandler.HandleError(
                 new InvalidVariationException("Provided variation is not in datafile."));
@@ -701,11 +697,9 @@ public Variation GetVariationFromIdByExperimentId(string experimentId, string va
                 return _VariationIdMapByExperimentId[experimentId][variationId];
             }
 
-            var message = $@"No variation ID ""{variationId
-            }"" defined in datafile for experiment ""{experimentId}"".";
+            var message = $@"No variation ID ""{variationId}"" defined in datafile for experiment ""{experimentId}"".";
             Logger.Log(LogLevel.ERROR, message);
-            ErrorHandler.HandleError(
-                new InvalidVariationException("Provided variation is not in datafile."));
+            ErrorHandler.HandleError(new InvalidVariationException("Provided variation is not in datafile."));
             return new Variation();
         }
 
@@ -788,9 +782,7 @@ public string GetAttributeId(string attributeKey)
                 if (hasReservedPrefix)
                 {
                     Logger.Log(LogLevel.WARN,
-                        $@"Attribute {attributeKey} unexpectedly has reserved prefix {
-                            RESERVED_ATTRIBUTE_PREFIX
-                        }; using attribute ID instead of reserved attribute name.");
+                        $@"Attribute {attributeKey} unexpectedly has reserved prefix {RESERVED_ATTRIBUTE_PREFIX}; using attribute ID instead of reserved attribute name.");
                 }
 
                 return attribute.Id;
@@ -825,12 +817,20 @@ public bool IsFeatureExperiment(string experimentId)
         }
 
         /// <summary>
-        ///Returns the datafile corresponding to ProjectConfig
+        /// Gets or sets the region associated with the project configuration.
+        /// This typically indicates the data residency or deployment region (e.g., "us", "eu").
+        /// Valid values depend on the Optimizely environment and configuration.
         /// </summary>
         /// <returns>the datafile string corresponding to ProjectConfig</returns>
         public string ToDatafile()
         {
             return _datafile;
         }
+
+        /// <summary>
+        /// Returns the datafile corresponding to ProjectConfig
+        /// </summary>
+        /// <returns>the datafile string corresponding to ProjectConfig</returns>
+        public string Region { get; set; }
     }
 }
diff --git a/OptimizelySDK/Event/Builder/EventBuilder.cs b/OptimizelySDK/Event/Builder/EventBuilder.cs
index 1d73ff94..0dd4562a 100644
--- a/OptimizelySDK/Event/Builder/EventBuilder.cs
+++ b/OptimizelySDK/Event/Builder/EventBuilder.cs
@@ -27,9 +27,6 @@ namespace OptimizelySDK.Event.Builder
     [Obsolete("This class is deprecated. Use 'OptimizelySDK.Event.EventFactory'.")]
     public class EventBuilder
     {
-        private const string IMPRESSION_ENDPOINT = "https://logx.optimizely.com/v1/events";
-
-        private const string CONVERSION_ENDPOINT = "https://logx.optimizely.com/v1/events";
 
         private const string HTTP_VERB = "POST";
 
@@ -245,7 +242,11 @@ public virtual LogEvent CreateImpressionEvent(ProjectConfig config, Experiment e
                 GetImpressionOrConversionParamsWithCommonParams(commonParams,
                     new object[] { impressionOnlyParams });
 
-            return new LogEvent(IMPRESSION_ENDPOINT, impressionParams, HTTP_VERB, HTTP_HEADERS);
+            var region = !string.IsNullOrEmpty(config.Region) && EventFactory.EventEndpoints.ContainsKey(config.Region) ? config.Region : "US";
+
+            var endpoint = EventFactory.EventEndpoints[region];
+
+            return new LogEvent(endpoint, impressionParams, HTTP_VERB, HTTP_HEADERS);
         }
 
 
@@ -271,7 +272,11 @@ public virtual LogEvent CreateConversionEvent(ProjectConfig config, string event
             var conversionParams =
                 GetImpressionOrConversionParamsWithCommonParams(commonParams, conversionOnlyParams);
 
-            return new LogEvent(CONVERSION_ENDPOINT, conversionParams, HTTP_VERB, HTTP_HEADERS);
+            var region = !string.IsNullOrEmpty(config.Region) && EventFactory.EventEndpoints.ContainsKey(config.Region) ? config.Region : "US";
+
+            var endpoint = EventFactory.EventEndpoints[region];
+
+            return new LogEvent(endpoint, conversionParams, HTTP_VERB, HTTP_HEADERS);
         }
     }
 }
diff --git a/OptimizelySDK/Event/Entity/EventContext.cs b/OptimizelySDK/Event/Entity/EventContext.cs
index 44b77644..718deba6 100644
--- a/OptimizelySDK/Event/Entity/EventContext.cs
+++ b/OptimizelySDK/Event/Entity/EventContext.cs
@@ -41,6 +41,9 @@ public class EventContext
         [JsonProperty("anonymize_ip")]
         public bool AnonymizeIP { get; protected set; }
 
+        [JsonProperty("region")]
+        public string Region { get; protected set; }
+
         /// <summary>
         /// EventContext builder
         /// </summary>
@@ -50,6 +53,7 @@ public class Builder
             private string ProjectId;
             private string Revision;
             private bool AnonymizeIP;
+            private string Region;
 
             public Builder WithAccountId(string accountId)
             {
@@ -75,6 +79,12 @@ public Builder WithAnonymizeIP(bool anonymizeIP)
                 return this;
             }
 
+            public Builder WithRegion(string region)
+            {
+                Region = region;
+                return this;
+            }
+
             /// <summary>
             /// Build EventContext instance
             /// </summary>
@@ -89,6 +99,7 @@ public EventContext Build()
                 eventContext.ClientName = Optimizely.SDK_TYPE;
                 eventContext.ClientVersion = Optimizely.SDK_VERSION;
                 eventContext.AnonymizeIP = AnonymizeIP;
+                eventContext.Region = Region;
 
                 return eventContext;
             }
diff --git a/OptimizelySDK/Event/EventFactory.cs b/OptimizelySDK/Event/EventFactory.cs
index 841b650f..771e0f39 100644
--- a/OptimizelySDK/Event/EventFactory.cs
+++ b/OptimizelySDK/Event/EventFactory.cs
@@ -34,9 +34,15 @@ public class EventFactory
     {
         private const string CUSTOM_ATTRIBUTE_FEATURE_TYPE = "custom";
 
-        public const string
-            EVENT_ENDPOINT =
-                "https://logx.optimizely.com/v1/events"; // Should be part of the datafile
+        // Supported regions for event endpoints
+        public static string[] SupportedRegions => EventEndpoints.Keys.ToArray();
+
+        // Dictionary of event endpoints for different regions
+        public static readonly Dictionary<string, string> EventEndpoints = new Dictionary<string, string>
+        {
+            {"US", "https://logx.optimizely.com/v1/events"},
+            {"EU", "https://eu.logx.optimizely.com/v1/events"}
+        };
 
         private const string ACTIVATE_EVENT_KEY = "campaign_activated";
 
@@ -63,6 +69,9 @@ public static LogEvent CreateLogEvent(UserEvent[] userEvents, ILogger logger)
 
             var visitors = new List<Visitor>(userEvents.Count());
 
+            // Default to US region
+            string region = "US";
+
             foreach (var userEvent in userEvents)
             {
                 if (userEvent is ImpressionEvent)
@@ -81,6 +90,12 @@ public static LogEvent CreateLogEvent(UserEvent[] userEvents, ILogger logger)
 
                 var userContext = userEvent.Context;
 
+                // Get region from the event's context, default to US if not specified
+                if (!string.IsNullOrEmpty(userContext.Region))
+                {
+                    region = userContext.Region;
+                }
+
                 builder.WithClientName(userContext.ClientName).
                     WithClientVersion(userContext.ClientVersion).
                     WithAccountId(userContext.AccountId).
@@ -102,7 +117,16 @@ public static LogEvent CreateLogEvent(UserEvent[] userEvents, ILogger logger)
             var eventBatchDictionary =
                 JObject.FromObject(eventBatch).ToObject<Dictionary<string, object>>();
 
-            return new LogEvent(EVENT_ENDPOINT, eventBatchDictionary, "POST",
+            // Use the region to determine the endpoint URL, falling back to US if the region is not found or not supported
+            string endpointUrl = EventEndpoints["US"]; // Default to US endpoint
+
+            // Only try to use the region-specific endpoint if it's a supported region
+            if (SupportedRegions.Contains(region) && EventEndpoints.ContainsKey(region))
+            {
+                endpointUrl = EventEndpoints[region];
+            }
+
+            return new LogEvent(endpointUrl, eventBatchDictionary, "POST",
                 new Dictionary<string, string>
                 {
                     { "Content-Type", "application/json" },
diff --git a/OptimizelySDK/Event/UserEventFactory.cs b/OptimizelySDK/Event/UserEventFactory.cs
index f073237a..28d6fb87 100644
--- a/OptimizelySDK/Event/UserEventFactory.cs
+++ b/OptimizelySDK/Event/UserEventFactory.cs
@@ -80,6 +80,7 @@ public static ImpressionEvent CreateImpressionEvent(ProjectConfig projectConfig,
                 WithAccountId(projectConfig.AccountId).
                 WithAnonymizeIP(projectConfig.AnonymizeIP).
                 WithRevision(projectConfig.Revision).
+                WithRegion(projectConfig.Region).
                 Build();
 
             var variationKey = "";
@@ -123,6 +124,7 @@ EventTags eventTags
                 WithAccountId(projectConfig.AccountId).
                 WithAnonymizeIP(projectConfig.AnonymizeIP).
                 WithRevision(projectConfig.Revision).
+                WithRegion(projectConfig.Region).
                 Build();
 
             return new ConversionEvent.Builder().
diff --git a/OptimizelySDK/ProjectConfig.cs b/OptimizelySDK/ProjectConfig.cs
index 58272aa7..8aab34f7 100644
--- a/OptimizelySDK/ProjectConfig.cs
+++ b/OptimizelySDK/ProjectConfig.cs
@@ -312,5 +312,10 @@ public interface ProjectConfig
         /// Returns the datafile corresponding to ProjectConfig
         /// </summary>
         string ToDatafile();
+
+        /// <summary>
+        /// Returns the datafile region to ProjectConfig
+        /// </summary>
+        string Region { get; set; }
     }
 }