Post office locations in 78550
| Post Office | Address | Phone | Hours |
| DOWNTOWN HARLINGEN | 221 E VAN BUREN AVE STE 3 HARLINGEN, TX 78550 - 6898 | 956-423-1430 | Mon-Fri 09:00 AM - 04:00 PM Sat-Sun Closed |
| HARLINGEN | 1502 NEW COMBES HWY HARLINGEN, TX 78550 - 9998 | 956-423-1464 | Mon-Fri 08:00 AM - 05:00 PM Sat 09:00 AM - 12:00 PM Sun Closed |