| County : | Calhoun County |
| State : | Iowa (IA) |
| Land Area : | 569.96 sq mi |
| Water Area : | 2.15 sq mi |
| Latitude : | 42.3861699 |
| Longitude : | -94.6436829 |
| Population (2010): | 9,670 |
| Population Estimate (2012) : | 9,936 |
| Population Density : | 16.97/sq mi |
| Housing Units (2012) : | 5,108 |
| Median Household Income (2012) : | $45,097 (Iowa : $51,129, USA : $53,046) |
| Median Family Income (2012) : | $53,620 (Iowa : $64,772, USA : $64,585) |
| Median House Price (2012) : | $72,200 (Iowa : $123,000, USA : $181,400) |
Calhoun County Cities / Towns
| Farnhamville City (371) | Jolley City (41) | Knierim City (60) |
| Lake City (1,727) | Lohrville City (368) | Lytton City (315) |
| Manson City (1,690) | Pomeroy City (662) | Rinard City (52) |
| Rockwell City (1,709) | Somers City (113) | Twin Lakes (334) |
| Yetter City (34) |
Calhoun County Zip Codes
| 50538 (503) | 50540 (1,022) | 50551 (158) |
| 50561 (520) | 50563 (2,500) | 50575 (969) |
| 50579 (2,405) | 50586 (307) | 51433 (676) |
| 51449 (2,128) | 51453 (695) |