ZIP CodesZIP codes in Calhoun County, Iowa
Calhoun County, Iowa has 10 ZIP codes in this list, from 50538 to 51453. They cover 10 places, among them Farnhamville, Jolley, Knierim and Lytton.
| ZIP code | Place | Land area (sq mi) | Map point |
|---|---|---|---|
| 50538 | Farnhamville | 35.5 | 42.269, -94.423 |
| 50551 | Jolley | 26.9 | 42.487, -94.757 |
| 50552 | Knierim | 0.5 | 42.456, -94.457 |
| 50561 | Lytton | 48.4 | 42.423, -94.860 |
| 50563 | Manson | 101 | 42.529, -94.530 |
| 50575 | Pomeroy | 62.1 | 42.551, -94.684 |
| 50579 | Rockwell City | 141 | 42.396, -94.629 |
| 50586 | Somers | 32.5 | 42.356, -94.446 |
| 51449 | Lake City | 89.7 | 42.270, -94.746 |
| 51453 | Lohrville | 78.8 | 42.262, -94.557 |
The ZIP code areas of Calhoun County add up to about 616 square miles of land (1,597 sq km) as the Census Bureau draws them. The largest is 50579 (Rockwell City), with 141 square miles.
Using these codes
- In an address, the ZIP code comes last, after the city and the two-letter state: Farnhamville, IA 50538.
- Tap a ZIP code to open it in the look-up, with a copy button for the address line.
- A code can cross a county line, and one town can have several codes. The table shows the main place of each code.
- "No area" means the Census Bureau draws no area for that code. Such codes are usually for post office boxes or a single building.
Places and counties: GeoNames. Areas: U.S. Census Bureau, 2024 ZIP Code Tabulation Areas. Checked in November 2026. This site is not connected with the United States Postal Service; for mailing, confirm the address with USPS.