Founded on Dec 21, 1837, Buchanan County is one of 99 counties in the state of Iowa. Historically, Buchanan County was formed from Delaware County and Wisconsin Territory. The city of Independence is the county seat. With FIPS code of 19, Buchanan County has a population of 20,657 and area of 571 square miles (1,479 km2).
List of all cities in Buchanan County, IA alphabetically
| City/Town | Postal Code | Area Code |
| Aurora, IA | 50607 | 319 |
| Brandon, IA | 52210 | 319 |
| Doris, IA | 50644 | 319 |
| Fairbank, IA | 50629 | 319 |
| Hazleton, IA | 50641 | 319 |
| Independence, IA | 50644 | 319 |
| Jesup, IA | 50648 | 319 |
| Lamont, IA | 50650 | 319 |
| Littleton, IA | 50648 | 319 |
| Otterville, IA | 50644 | 319 |
| Quasqueton, IA | 52326 | 319 |
| Rowley, IA | 52329 | 319 |
| Shady Grove, IA | 50648 | 319 |
| Stanley, IA | 50671 | 319 |
| Winthrop, IA | 50682 | 319 |