Founded in 1833, Pettis County is one of 114 counties in the state of Missouri. Historically, Pettis County was formed from Cooper and Saline counties. The city of Sedalia is the county seat. With FIPS code of 159, Pettis County has a population of 43,188 and area of 685 square miles (1,774 km2).
List of all cities in Pettis County, MO alphabetically
| City/Town | Postal Code | Area Code |
| Bahner, MO | 65350 | 660 |
| Beaman, MO | 65350 | 660 |
| Dresden, MO | 65301 | 660 |
| Georgetown, MO | 65301 | 660 |
| Green Ridge, MO | 65332 | 660 |
| Houstonia, MO | 65333 | 660 |
| Hughesville, MO | 65334 | 660 |
| La Monte, MO | 65337 | 660 |
| Longwood, MO | 65301 | 660 |
| 65334 | 660 | |
| Mora, MO | 65345 | 660 |
| Sedalia, MO | 65301 | 660 |
| 65302 | 660 | |
| Smithton, MO | 65350 | 660 |
| Springfork, MO | 65301 | 660 |