| Name | Lamar County |
| State | Georgia |
| FIPS Code | 13171 |
| County Seat | Barnesville |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2024) | 20,420 |
| Population Growth Rate(2020-2024) | 9.39% |
| Majority Ethnicity | White 68.88% |
| Public School Majority Ethnicity | White 58% |
| Partisan Voting Index | Strongly Republican:+23 |
| Unemployment Rate (May 2026) | 4.4% |
| Sales Tax Rate (2025) | 8% |
| Area Code(s) | 470 / 678 / 770 / 943 |
| Race/Ethnicity | Percentage of Population (2023) |
|---|---|
| White | 68.88% |
| African American | 29.48% |
| Hispanic | 0.86% |
| Asian | 0.7% |
| Native American | 0.08% |
| Hawaiin/Pacific Islander | 0% |
| Race/Ethnicity | Percentage of Public School Students (2023) |
|---|---|
| White | 57.77% |
| African American | 31.06% |
| Hispanic | 4.72% |
| Asian | 0.39% |
| Native American | 0.07% |
| Hawaiin/Pacific Islander | 0.07% |