diff --git a/agent/agent_endpoint.go b/agent/agent_endpoint.go
index 4ae979b884..66db9f1544 100644
--- a/agent/agent_endpoint.go
+++ b/agent/agent_endpoint.go
@@ -1067,7 +1067,20 @@ func (s *HTTPServer) AgentConnectProxyConfig(resp http.ResponseWriter, req *http
 				// Rely on the fact that TelemetryConfig makes a new map each call to
 				// override the prefix here without affecting other callers.
 				telemetry["MetricsPrefix"] = "consul.proxy." + target.ID
-				config["telemetry"] = telemetry
+
+				// Merge with any config passed by the user to allow service definition
+				// to override.
+				if userRaw, ok := config["telemetry"]; ok {
+					if userT, ok := userRaw.(map[string]interface{}); ok {
+						for k, v := range telemetry {
+							if _, ok := userT[k]; !ok {
+								userT[k] = v
+							}
+						}
+					}
+				} else {
+					config["telemetry"] = telemetry
+				}
 			}
 
 			reply := &api.ConnectProxyConfig{
diff --git a/agent/agent_endpoint_test.go b/agent/agent_endpoint_test.go
index 7e18cde666..be9dc7d81a 100644
--- a/agent/agent_endpoint_test.go
+++ b/agent/agent_endpoint_test.go
@@ -3386,6 +3386,9 @@ func TestAgentConnectProxyConfig_ConfigHandling(t *testing.T) {
 				proxy_min_port = 10000
 				proxy_max_port = 10000
 			}
+			telemetry {
+				statsite_address = "localhost:8989"
+			}
 			`,
 			proxy: structs.ServiceDefinitionConnectProxy{
 				Config: map[string]interface{}{
@@ -3400,7 +3403,11 @@ func TestAgentConnectProxyConfig_ConfigHandling(t *testing.T) {
 				"local_service_address": "127.0.0.1:8000", // port from service reg
 				"connect_timeout_ms":    1000,
 				"foo":                   "bar",
-				"telemetry":             makeTelemetryDefaults(reg.ID),
+				"telemetry": map[string]interface{}{
+					"FilterDefault": true,
+					"MetricsPrefix": "consul.proxy." + reg.ID,
+					"StatsiteAddr":  "localhost:8989",
+				},
 			},
 		},
 		{
@@ -3425,6 +3432,9 @@ func TestAgentConnectProxyConfig_ConfigHandling(t *testing.T) {
 				proxy_min_port = 10000
 				proxy_max_port = 10000
 			}
+			telemetry {
+				statsite_address = "localhost:8989"
+			}
 			`,
 			proxy: structs.ServiceDefinitionConnectProxy{
 				ExecMode: "script",
@@ -3434,6 +3444,9 @@ func TestAgentConnectProxyConfig_ConfigHandling(t *testing.T) {
 					"bind_address":          "127.0.0.1",
 					"bind_port":             1024,
 					"local_service_address": "127.0.0.1:9191",
+					"telemetry": map[string]interface{}{
+						"StatsiteAddr": "stats.it:10101",
+					},
 				},
 			},
 			wantMode:    api.ProxyExecModeScript,
@@ -3443,7 +3456,11 @@ func TestAgentConnectProxyConfig_ConfigHandling(t *testing.T) {
 				"bind_port":             float64(1024),
 				"local_service_address": "127.0.0.1:9191",
 				"connect_timeout_ms":    float64(2000),
-				"telemetry":             makeTelemetryDefaults(reg.ID),
+				"telemetry": map[string]interface{}{
+					"FilterDefault": true,
+					"MetricsPrefix": "consul.proxy." + reg.ID,
+					"StatsiteAddr":  "stats.it:10101",
+				},
 			},
 		},
 	}