| Locality | Post Code |
|---|---|
| Conley, Clayton | 30288 |
| Ellenwood, Clayton | 30294 |
| Forest, Clayton | 30298 |
| Forest Park, Clayton | 30297 |
| Fort Gillem, Clayton | 30297 |
| Gillem Enclave, Clayton | 30297 |
| Hampton, Clayton | 30228 |
| Jonesboro, Clayton | 30236, 30238 |
| Lake City, Clayton | 30260 |
| Lake Spivey, Clayton | 30236 |
| Lovejoy, Clayton | 30250 |
| Morrow, Clayton | 30260 |
| Rex, Clayton | 30273 |
| Riverdale, Clayton | 30274, 30296 |