Founded in 1835, Shelby County is one of 114 counties in the state of Missouri. Historically, Shelby County was formed from Marion County. The city of Shelbyville is the county seat. With FIPS code of 205, Shelby County has a population of 5,976 and area of 501 square miles (1,298 km2).
List of all cities in Shelby County, MO alphabetically
| City/Town | Postal Code | Area Code |
| Bethel, MO | 63434 | 660 |
| Cherry Box, MO | 63437 | 660 |
| Clarence, MO | 63437 | 660 |
| Duncans Bridge, MO | 63437 | 660 |
| Emden, MO | 63439 | 573 |
| Hagars Grove, MO | 63437 | 660 |
| Hunnewell, MO | 63443 | 573 |
| Lakenan, MO | 63468 | 573 |
| Lentner, MO | 63450 | 573 |
| Leonard, MO | 63451 | 660 |
| Maud, MO | 63437 | 660 |
| Shelbina, MO | 63468 | 573 |
| Shelbyville, MO | 63469 | 573 |