Post Offices List in Willacy County, Texas:
| Lasara Post Office | 12056 Fm 1015, Lasara, TX 78561 |
| Lyford Post Office | 13461 W Broadway, Lyford, TX 78569 |
| Raymondville Post Office | 705 E Hidalgo Ave, Raymondville, TX 78580 |
| San Perlita Post Office | 14264 Fm 2209, San Perlita, TX 78590 |
| Sebastian Post Office | 3476 Business 77, Sebastian, TX 78594 |