| Locality | Post Code |
|---|---|
| Arthur City, Lamar | 75411 |
| Blossom, Lamar | 75416 |
| Brookston, Lamar | 75421 |
| Chicota, Lamar | 75425 |
| Cunningham, Lamar | 75434 |
| Deport, Lamar | 75435 |
| Paris, Lamar | 75460, 75462 |
| Pattonville, Lamar | 75468 |
| Petty, Lamar | 75470 |
| Powderly, Lamar | 75473 |
| Reno, Lamar | 75462 |
| Roxton, Lamar | 75477 |
| Sumner, Lamar | 75486 |