Founded in 1843, Putnam County is one of 114 counties in the state of Missouri. Historically, Putnam County was formed from Adair and Sullivan counties. The city of Unionville is the county seat. With FIPS code of 171, Putnam County has a population of 4,712 and area of 518 square miles (1,342 km2).
List of all cities in Putnam County, MO alphabetically
| City/Town | Postal Code | Area Code |
| Graysville, MO | 63565 | 660 |
| Lemons, MO | 63565 | 660 |
| Livonia, MO | 63551 | 660 |
| Lucerne, MO | 64655 | 660 |
| Martinstown, MO | 63565 | 660 |
| Mendota, MO | 63565 | 660 |
| Powersville, MO | 64672 | 660 |
| Unionville, MO | 63565 | 660 |
| Worthington, MO | 63567 | 660 |