Founded in 1838, Buchanan County is one of 114 counties in the state of Missouri. Historically, Buchanan County was formed from part of the Platte Purchase. The city of Saint Joseph is the county seat. With FIPS code of 21, Buchanan County has a population of 83,853 and area of 410 square miles (1,062 km2).
List of all cities in Buchanan County, MO alphabetically
| City/Town | Postal Code | Area Code |
| Agency, MO | 64401 | 816/975 |
| Country Club, MO | 64505 | 816/975 |
| 64506 | 816/975 | |
| De Kalb, MO | 64440 | 816/975 |
| Easton, MO | 64443 | 816/975 |
| Faucett, MO | 64448 | 816/975 |
| Rushville, MO | 64484 | 816/975 |
| Saint Joseph, MO | 64501 | 816/975 |
| 64502 | 816/975 | |
| 64503 | 816/975 | |
| 64504 | 816/975 | |
| 64505 | 816/975 | |
| 64506 | 816/975 | |
| 64507 | 816/975 | |
| 64508 | 816/975 | |
| Winthrop, MO | 64484 | 816/975 |