Post Offices List in Clay County, Texas:
| Bellevue Post Office | 501 Franklin St, Bellevue, TX 76228 |
| Bluegrove Post Office | 1720 Fm 172, Bluegrove, TX 76352 |
| Byers Post Office | 206 Central Ave, Byers, TX 76357 |
| Henrietta Post Office | 202 W Ikard St, Henrietta, TX 76365 |
| Petrolia Post Office | 108 W Benton St, Petrolia, TX 76377 |