diff --git a/docs/release-notes/version-2.10.md b/docs/release-notes/version-2.10.md
index 27d9fef49..98595ff4a 100644
--- a/docs/release-notes/version-2.10.md
+++ b/docs/release-notes/version-2.10.md
@@ -17,6 +17,7 @@
 * [#5603](https://github.com/netbox-community/netbox/issues/5603) - Fix display of white cables in trace view
 * [#5639](https://github.com/netbox-community/netbox/issues/5639) - Fix filtering connection lists by device name
 * [#5640](https://github.com/netbox-community/netbox/issues/5640) - Fix permissions assessment when adding VM interfaces in bulk
+* [#5665](https://github.com/netbox-community/netbox/issues/5665) - Validate rack group is assigned to same site when creating a rack
 
 ---
 
diff --git a/netbox/dcim/models/racks.py b/netbox/dcim/models/racks.py
index ccc775954..dfaf7da61 100644
--- a/netbox/dcim/models/racks.py
+++ b/netbox/dcim/models/racks.py
@@ -299,6 +299,10 @@ class Rack(ChangeLoggedModel, CustomFieldModel):
     def clean(self):
         super().clean()
 
+        # Validate group/site assignment
+        if self.site and self.group and self.group.site != self.site:
+            raise ValidationError(f"Assigned rack group must belong to parent site ({self.site}).")
+
         # Validate outer dimensions and unit
         if (self.outer_width is not None or self.outer_depth is not None) and not self.outer_unit:
             raise ValidationError("Must specify a unit when setting an outer width/depth")