Post Offices List in Jefferson County, Idaho:
| Hamer Post Office | 2449 E 2100 N, Hamer, ID 83425 |
| Lewisville Post Office | 3444 E 480 N, Lewisville, ID 83431 |
| Menan Post Office | 3509 E Menan Lorenzo Hwy, Menan, ID 83434 |
| Monteview Post Office | 2381 N 800 E, Monteview, ID 83435 |
| Rigby Post Office | 165 S State St, Rigby, ID 83442 |
| Ririe Post Office | 120 W Ririe Hwy, Ririe, ID 83443 |
| Roberts Post Office | 2876 E 650 N, Roberts, ID 83444 |
| Terreton Post Office | 1290 E 1500 N, Terreton, ID 83450 |