diff --git a/doc/api/geo_nodes.md b/doc/api/geo_nodes.md
index 6363e4538abf5bdd658a7d0a8e483eb019403adc..566f9f5b1b0588d7ddee7bcc4e808014585aa54e 100644
--- a/doc/api/geo_nodes.md
+++ b/doc/api/geo_nodes.md
@@ -4,12 +4,17 @@ group: Geo
 info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://handbook.gitlab.com/handbook/product/ux/technical-writing/#assignments
 ---
 
-# Geo Nodes API
+# Geo Nodes API (deprecated)
 
 DETAILS:
 **Tier:** Premium, Ultimate
 **Offering:** Self-managed
 
+WARNING:
+The Geo Nodes API was [deprecated](https://gitlab.com/gitlab-org/gitlab/-/issues/369140) in GitLab 16.0
+and is planned for removal in v5 of the API. Use the [Geo Sites API](geo_sites.md) instead.
+This change is a breaking change.
+
 To interact with Geo node endpoints, you must authenticate yourself as an
 administrator.