Post Offices List in Lamb County, Texas:
| Amherst Post Office | 815 Main St, Amherst, TX 79312 |
| Earth Post Office | 105 N Amherst Rd, Earth, TX 79031 |
| Littlefield Post Office | 801 Phelps Ave, Littlefield, TX 79339 |
| Olton Post Office | 416 8th St, Olton, TX 79064 |
| Spade Post Office | 2756 Fm 168, Spade, TX 79369 |
| Springlake Post Office | 108 W Main St, Springlake, TX 79082 |
| Sudan Post Office | 105 Hornet Dr, Sudan, TX 79371 |