| Locality | Post Code |
|---|---|
| Clarks, Calhoun | 77979 |
| Green Lake, Calhoun | 77979 |
| Indianola, Calhoun | 77979 |
| Kamey, Calhoun | 77979 |
| Long Mott, Calhoun | 77979 |
| Magnolia Beach, Calhoun | 77979 |
| Olivia, Calhoun | 77979 |
| Point Comfort, Calhoun | 77978 |
| Port Alto, Calhoun | 77979 |
| Port Lavaca, Calhoun | 77979 |
| Port O Connor, Calhoun | 77982 |
| Seadrift, Calhoun | 77983 |
| Weedhaven, Calhoun | 77979 |