9 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Augusta | 1 | 201,663 | 202,075 | -0.04% | 667 | 302 | Township |
| Augusta | 2 | 201,663 | 202,031 | -0.04% | 667 | 302 | Township |
| Evans | 3 | 39,567 | 38,443 | 1.81% | 1,566 | 25 | CDP |
| Martinez | 4 | 33,268 | 34,912 | -0.5% | 2,293 | 15 | CDP |
| Grovetown | 5 | 18,323 | 15,571 | 2.69% | 3,476 | 5 | City |
| Grovetown | 6 | 18,323 | 15,923 | 2.69% | 3,476 | 5 | City |
| Harlem | 7 | 4,194 | 3,561 | 2.89% | 637 | 7 | City |
| Harlem | 8 | 4,194 | 3,603 | 2.89% | 637 | 7 | City |
| Appling | 9 | 876 | 833 | 7.09% | 99 | 9 | CDP |
Augusta is the largest city in Columbia County, with a population of 201,663.
Appling is the smallest city in Columbia County, with a population of 876.
There are 9 cities in Columbia County, Georgia.