| Locality | Post Code |
|---|---|
| Ames, Liberty | 77575 |
| Clark, Liberty | 77327 |
| Cleveland, Liberty | 77327, 77328 |
| Daisetta, Liberty | 77533 |
| Dayton, Liberty | 77535 |
| Dayton Lakes, Liberty | 77535 |
| Devers, Liberty | 77538 |
| Eastgate, Liberty | 77535 |
| Evergreen, Liberty | 77327 |
| Everitt, Liberty | 77327 |
| Hardin, Liberty | 77561 |
| Hull, Liberty | 77564 |
| Kenefick, Liberty | 77535 |
| Liberty, Liberty | 77575 |
| Midline, Liberty | 77327 |
| Mont Belvieu, Liberty | 77535 |
| Moss Bluff, Liberty | 77575 |
| Moss Hill, Liberty | 77575 |
| North Cleveland, Liberty | 77327 |
| Old River-Winfree, Liberty | 77535 |
| Plum Grove, Liberty | 77327 |
| Rayburn, Liberty | 77327 |
| Raywood, Liberty | 77582 |
| Romayor, Liberty | 77368 |
| Rye, Liberty | 77369 |
| Security, Liberty | 77327 |