Post Offices List in Trinity County, Texas:
| Apple Springs Post Office | 15799 N State Highway 94, Apple Springs, TX 75926 |
| Groveton Post Office | 147 E 2nd St, Groveton, TX 75845 |
| Pennington Post Office | 6552 Fm 2781, Pennington, TX 75856 |
| Trinity Post Office | 116 W Main St, Trinity, TX 75862 |
| Woodlake Post Office | 5923 E Us Highway 287, Woodlake, TX 75865 |
| Centralia Post Office | 100 Fm 357, Centralia, TX 75834 |