| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Sandersville | 1 | 5,322 | 5,780 | -1.39% | 423 | 13 | City |
| Tennille | 2 | 1,878 | 1,540 | 4.04% | 1,080 | 2 | City |
| Davisboro | 3 | 1,839 | 1,832 | 0.71% | 603 | 3 | City |
| Harrison | 4 | 313 | 339 | -1.57% | 183 | 2 | Town |
| Oconee | 5 | 171 | 182 | -1.16% | 151 | 1 | City |
| Riddleville | 6 | 77 | 81 | -1.28% | 101 | 1 | Town |
Sandersville is the largest city in Washington County, with a population of 5,322.
Riddleville is the smallest city in Washington County, with a population of 77.
There are 6 cities in Washington County, Georgia.