Post Offices List in Calhoun County, Iowa:
| Farnhamville Post Office | 300 Garfield Ave, Farnhamville, IA 50538 |
| Jolley Post Office | 118 Main St, Jolley, IA 50551 |
| Lake City Post Office | 202 E Jefferson St, Lake City, IA 51449 |
| Lohrville Post Office | 416 2nd St, Lohrville, IA 51453 |
| Manson Post Office | 1006 11th St, Manson, IA 50563 |
| Pomeroy Post Office | 116 S Main St, Pomeroy, IA 50575 |
| Rockwell City Post Office | 520 4th St, Rockwell City, IA 50579 |
| Somers Post Office | 614 6th Ave, Somers, IA 50586 |