6 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Sandersville | 1 | 5,429 | 5,782 | -1.29% | 432 | 13 | City |
| Davisboro | 2 | 1,973 | 1,836 | 1.39% | 647 | 3 | City |
| Tennille | 3 | 1,923 | 1,537 | 4.17% | 1,106 | 2 | City |
| Harrison | 4 | 320 | 338 | -1.23% | 187 | 2 | Town |
| Oconee | 5 | 181 | 189 | -1.09% | 159 | 1 | City |
| Riddleville | 6 | 78 | 82 | -1.27% | 102 | 1 | Town |
Sandersville is the largest city in Washington County, with a population of 5,429.
Riddleville is the smallest city in Washington County, with a population of 78.
There are 6 cities in Washington County, Georgia.