Post Offices List in Caldwell County, Texas:
| Dale Post Office | 1383 Fm 1854, Dale, TX 78616 |
| Fentress Post Office | 109 Gonzales Ave, Fentress, TX 78622 |
| Lockhart Post Office | 217 W Market St, Lockhart, TX 78644 |
| Luling Post Office | 517 E Crockett St, Luling, TX 78648 |
| Martindale Post Office | 307 Lockhart St, Martindale, TX 78655 |
| Maxwell Post Office | 32 Fm 1966, Maxwell, TX 78656 |
| Prairie Lea Post Office | 6855 San Marcos Hwy, Prairie Lea, TX 78661 |