@@ -45,8 +45,11 @@ private constructor(
     }
 
     override fun baseUrl(): String =
-        if (region == "global") "https://aiplatform.googleapis.com"
-        else "https://$region-aiplatform.googleapis.com"
+        when (region) {
+            "global" -> "https://aiplatform.googleapis.com"
+            "us" -> "https://aiplatform.us.rep.googleapis.com"
+            else -> "https://$region-aiplatform.googleapis.com"
+        }
 
     override fun prepareRequest(request: HttpRequest): HttpRequest {
         val pathSegments = request.pathSegments
 
@@ -71,6 +71,22 @@ internal class VertexBackendTest {
         assertThat(backend.baseUrl()).isEqualTo("https://$GC_REGION-aiplatform.googleapis.com")
     }
 
+    @Test
+    fun baseUrlGlobalRegion() {
+        val backend1 = createBackend()
+        val globalBackend = createBackend(backend1.googleCredentials, "global", backend1.project)
+
+        assertThat(globalBackend.baseUrl()).isEqualTo("https://aiplatform.googleapis.com")
+    }
+
+    @Test
+    fun baseUrlUsRegion() {
+        val backend1 = createBackend()
+        val usBackend = createBackend(backend1.googleCredentials, "us", backend1.project)
+
+        assertThat(usBackend.baseUrl()).isEqualTo("https://aiplatform.us.rep.googleapis.com")
+    }
+
     @Test
     fun baseUrlOtherRegion() {
         // Try with a *different* region to confirm that it is not hard-coded.
@@ -82,14 +98,6 @@ internal class VertexBackendTest {
         assertThat(backend2.baseUrl()).isEqualTo("https://$otherRegion-aiplatform.googleapis.com")
     }
 
-    @Test
-    fun baseUrlGlobalRegion() {
-        val backend1 = createBackend()
-        val globalBackend = createBackend(backend1.googleCredentials, "global", backend1.project)
-
-        assertThat(globalBackend.baseUrl()).isEqualTo("https://aiplatform.googleapis.com")
-    }
-
     @Test
     fun prepareRequestMissingJSON() {
         val backend = createBackend()