10 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Glennville | 1 | 5,061 | 5,271 | -0.84% | 718 | 7 | City |
| Glennville | 2 | 5,061 | 5,273 | -0.84% | 718 | 7 | City |
| Reidsville | 3 | 2,563 | 2,516 | 0.31% | 338 | 8 | City |
| Reidsville | 4 | 2,563 | 2,521 | 0.31% | 338 | 8 | City |
| Collins | 5 | 542 | 542 | 0% | 531 | 1 | City |
| Collins | 6 | 542 | 542 | 0% | 531 | 1 | City |
| Cobbtown | 7 | 338 | 342 | -0.29% | 505 | 1 | City |
| Cobbtown | 8 | 338 | 342 | -0.29% | 505 | 1 | City |
| Manassas | 9 | 61 | 60 | 0% | 79 | 1 | City |
| Manassas | 10 | 61 | 60 | 0% | 79 | 1 | City |
Glennville is the largest city in Tattnall County, with a population of 5,061.
Manassas is the smallest city in Tattnall County, with a population of 61.
There are 10 cities in Tattnall County, Georgia.