Founded in 1920, Lamar County is one of 159 counties in the state of Georgia. Historically, Lamar County was formed from Monroe and Pike Counties. The city of Barnesville is the county seat. With FIPS code of 171, Lamar County has a population of 19,080 and area of 185 square miles (479 km2).
List of all cities in Lamar County, GA alphabetically
| City/Town | Postal Code | Area Code |
| Barnesville, GA | 30204 | 770/678/470 |
| Milner, GA | 30257 | 770/678/470 |
Map of Cities in Lamar County, GA
