6 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Augusta | 1 | 200,140 | 201,999 | -0.19% | 662 | 302.28 | Township |
| Evans | 2 | 39,567 | 38,443 | 1.81% | 1,566 | 25.27 | CDP |
| Martinez | 3 | 33,268 | 34,912 | -0.5% | 2,293 | 14.51 | CDP |
| Grovetown | 4 | 18,682 | 15,926 | 3.04% | 3,544 | 5.27 | City |
| Harlem | 5 | 4,244 | 3,613 | 3.06% | 644 | 6.59 | City |
| Appling | 6 | 876 | 833 | 7.09% | 99 | 8.82 | CDP |
Augusta is the largest city in Columbia County, with a population of 200,140.
Appling is the smallest city in Columbia County, with a population of 876.
There are 6 cities in Columbia County, Georgia.