Post Offices List in Duval County, Texas:
| Benavides Post Office | 404 E Main, Benavides, TX 78341 |
| Freer Post Office | 320 S Main St, Freer, TX 78357 |
| Realitos Post Office | 6417 Highway 359, Realitos, TX 78376 |
| San Diego Post Office | 111 N Victoria St, San Diego, TX 78384 |
| Concepcion Post Office | 2239 Fm 716, Concepcion, TX 78349 |