Post Offices List in Shelby County, Iowa:
| Defiance Post Office | 209 Main St, Defiance, IA 51527 |
| Earling Post Office | 110 Main St, Earling, IA 51530 |
| Elk Horn Post Office | 4214 Main St, Elk Horn, IA 51531 |
| Harlan Post Office | 1209 7th St, Harlan, IA 51537 |
| Irwin Post Office | 516 Ann St, Irwin, IA 51446 |
| Panama Post Office | 118 Main St, Panama, IA 51562 |
| Portsmouth Post Office | 207 Main St, Portsmouth, IA 51565 |
| Shelby Post Office | 415 East St, Shelby, IA 51570 |
| Westphalia Post Office | 205 4th St, Westphalia, IA 51578 |