diff --git a/generativeai/src/main/java/com/google/ai/client/generativeai/internal/api/APIController.kt b/generativeai/src/main/java/com/google/ai/client/generativeai/internal/api/APIController.kt
index fd750111..9a7b5474 100644
--- a/generativeai/src/main/java/com/google/ai/client/generativeai/internal/api/APIController.kt
+++ b/generativeai/src/main/java/com/google/ai/client/generativeai/internal/api/APIController.kt
@@ -19,6 +19,7 @@ package com.google.ai.client.generativeai.internal.api
 import com.google.ai.client.generativeai.BuildConfig
 import com.google.ai.client.generativeai.internal.util.decodeToFlow
 import com.google.ai.client.generativeai.type.ServerException
+import com.google.ai.client.generativeai.type.UnsupportedUserLocationException
 import io.ktor.client.HttpClient
 import io.ktor.client.call.body
 import io.ktor.client.engine.HttpClientEngine
@@ -174,6 +175,10 @@ private suspend fun validateResponse(response: HttpResponse) {
         "Unexpected Response:\n$text"
       }
 
+    // TODO (b/325117891): Use a better method than string matching.
+    if (message == "User location is not supported for the API use.") {
+      throw UnsupportedUserLocationException()
+    }
     throw ServerException(message)
   }
 }
diff --git a/generativeai/src/main/java/com/google/ai/client/generativeai/type/Exceptions.kt b/generativeai/src/main/java/com/google/ai/client/generativeai/type/Exceptions.kt
index 9171da3c..c08285e1 100644
--- a/generativeai/src/main/java/com/google/ai/client/generativeai/type/Exceptions.kt
+++ b/generativeai/src/main/java/com/google/ai/client/generativeai/type/Exceptions.kt
@@ -68,6 +68,16 @@ class PromptBlockedException(val response: GenerateContentResponse, cause: Throw
     cause
   )
 
+/**
+ * The user's location (region) is not supported by the API.
+ *
+ * See the Google documentation for a
+ * [list of regions](https://ai.google.dev/available_regions#available_regions) (countries and
+ * territories) where the API is available.
+ */
+class UnsupportedUserLocationException(cause: Throwable? = null) :
+  GoogleGenerativeAIException("User location is not supported for the API use.", cause)
+
 /**
  * Some form of state occurred that shouldn't have.
  *
diff --git a/generativeai/src/test/java/com/google/ai/client/generativeai/UnarySnapshotTests.kt b/generativeai/src/test/java/com/google/ai/client/generativeai/UnarySnapshotTests.kt
index f440ec53..87305c1b 100644
--- a/generativeai/src/test/java/com/google/ai/client/generativeai/UnarySnapshotTests.kt
+++ b/generativeai/src/test/java/com/google/ai/client/generativeai/UnarySnapshotTests.kt
@@ -23,6 +23,7 @@ import com.google.ai.client.generativeai.type.PromptBlockedException
 import com.google.ai.client.generativeai.type.ResponseStoppedException
 import com.google.ai.client.generativeai.type.SerializationException
 import com.google.ai.client.generativeai.type.ServerException
+import com.google.ai.client.generativeai.type.UnsupportedUserLocationException
 import com.google.ai.client.generativeai.util.goldenUnaryFile
 import io.kotest.assertions.throwables.shouldThrow
 import io.kotest.matchers.should
@@ -94,6 +95,14 @@ internal class UnarySnapshotTests {
       withTimeout(testTimeout) { shouldThrow<ServerException> { model.generateContent() } }
     }
 
+  @Test
+  fun `user location error`() =
+    goldenUnaryFile("failure-unsupported-user-location.json", HttpStatusCode.PreconditionFailed) {
+      withTimeout(testTimeout) {
+        shouldThrow<UnsupportedUserLocationException> { model.generateContent() }
+      }
+    }
+
   @Test
   fun `stopped for safety`() =
     goldenUnaryFile("failure-finish-reason-safety.json") {
diff --git a/generativeai/src/test/resources/golden-files/unary/failure-unsupported-user-location.json b/generativeai/src/test/resources/golden-files/unary/failure-unsupported-user-location.json
new file mode 100644
index 00000000..c4c2ace4
--- /dev/null
+++ b/generativeai/src/test/resources/golden-files/unary/failure-unsupported-user-location.json
@@ -0,0 +1,13 @@
+{
+  "error": {
+    "code": 400,
+    "message": "User location is not supported for the API use.",
+    "status": "FAILED_PRECONDITION",
+    "details": [
+      {
+        "@type": "type.googleapis.com/google.rpc.DebugInfo",
+        "detail": "[ORIGINAL ERROR] generic::failed_precondition: User location is not supported for the API use. [google.rpc.error_details_ext] { message: \"User location is not supported for the API use.\" }"
+      }
+    ]
+  }
+}