diff --git a/changelog.d/18541.misc b/changelog.d/18541.misc
new file mode 100644
index 0000000000..2c733e3e50
--- /dev/null
+++ b/changelog.d/18541.misc
@@ -0,0 +1 @@
+Log user deactivations.
diff --git a/synapse/handlers/deactivate_account.py b/synapse/handlers/deactivate_account.py
index 12a7cace55..42e53d920a 100644
--- a/synapse/handlers/deactivate_account.py
+++ b/synapse/handlers/deactivate_account.py
@@ -96,6 +96,14 @@ class DeactivateAccountHandler:
                 403, "Deactivation of this user is forbidden", Codes.FORBIDDEN
             )
 
+        logger.info(
+            "%s requested deactivation of %s erase_data=%s id_server=%s",
+            requester.user,
+            user_id,
+            erase_data,
+            id_server,
+        )
+
         # FIXME: Theoretically there is a race here wherein user resets
         # password using threepid.