diff --git a/HISTORY.rst b/HISTORY.rst
index 325a58dd..67a755a8 100644
--- a/HISTORY.rst
+++ b/HISTORY.rst
@@ -4,6 +4,12 @@
 History
 -------
 
+4.9.0
+++++++++++++++++++
+
+* ``metro_code`` on ``geoip2.record.Location`` has been deprecated. The
+  code values are no longer being maintained.
+
 4.8.1 (2024-11-18)
 ++++++++++++++++++
 
diff --git a/geoip2/records.py b/geoip2/records.py
index a45bb6ad..d6bb61ea 100644
--- a/geoip2/records.py
+++ b/geoip2/records.py
@@ -357,10 +357,10 @@ class Location(Record):
 
     .. attribute:: metro_code
 
-      The metro code of the location if the
-      location is in the US. MaxMind returns the same metro codes as the
-      `Google AdWords API
-      <https://developers.google.com/adwords/api/docs/appendix/cities-DMAregions>`_.
+      The metro code is a no-longer-maintained code for targeting
+      advertisements in Google.
+
+      .. deprecated:: 4.9.0
 
       :type: int