| County : | Buchanan County |
| State : | Iowa (IA) |
| Land Area : | 571.02 sq mi |
| Water Area : | 2.10 sq mi |
| Latitude : | 42.4703284 |
| Longitude : | -91.8386658 |
| Population (2010): | 20,958 |
| Population Estimate (2012) : | 20,988 |
| Population Density : | 36.70/sq mi |
| Housing Units (2012) : | 8,968 |
| Median Household Income (2012) : | $54,596 (Iowa : $51,129, USA : $53,046) |
| Median Family Income (2012) : | $66,134 (Iowa : $64,772, USA : $64,585) |
| Median House Price (2012) : | $117,800 (Iowa : $123,000, USA : $181,400) |
Buchanan County Cities / Towns
| Aurora City (185) | Brandon City (309) | Fairbank City (1,113) |
| Hazleton City (823) | Independence City (5,966) | Jesup City (2,520) |
| Lamont City (461) | Quasqueton City (554) | Rowley City (264) |
| Stanley City (125) | Winthrop City (850) |
Buchanan County Zip Codes
| 50607 (481) | 50629 (2,418) | 50641 (2,017) |
| 50644 (8,648) | 50648 (4,054) | 50650 (737) |
| 50654 (499) | 50662 (7,238) | 50671 (269) |
| 50682 (1,572) | 52210 (697) | 52218 (1,788) |
| 52326 (547) | 52329 (803) | 52352 (2,025) |