Founded in 1855, Barton County is one of 114 counties in the state of Missouri. Historically, Barton County was formed from Jasper County. The city of Lamar is the county seat. With FIPS code of 11, Barton County has a population of 11,658 and area of 594 square miles (1,538 km2).
List of all cities in Barton County, MO alphabetically
| City/Town | Postal Code | Area Code |
| Asbury, MO | 64832 | 417 |
| Golden City, MO | 64748 | 417 |
| Iantha, MO | 64759 | 417 |
| Irwin, MO | 64759 | 417 |
| Lamar, MO | 64759 | 417 |
| Lamar, MO | 64766 | 417 |
| Liberal, MO | 64762 | 417 |
| Milford, MO | 64766 | 417 |
| Mindenmines, MO | 64769 | 417 |