7 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Sandersville | 1 | 5,370 | 5,784 | -1.52% | 417 | 13 | City |
| Tennille | 2 | 2,043 | 1,497 | 5.64% | 1,243 | 2 | City |
| Davisboro | 3 | 2,009 | 1,834 | 1.77% | 658 | 3 | City |
| Harrison | 4 | 311 | 338 | -1.58% | 182 | 2 | Town |
| Warthen | 5 | 197 | 148 | 7.07% | 623 | 0 | CDP |
| Oconee | 6 | 179 | 191 | -1.1% | 138 | 1 | City |
| Riddleville | 7 | 74 | 81 | -1.33% | 97 | 1 | Town |
Sandersville is the largest city in Washington County, with a population of 5,370.
Riddleville is the smallest city in Washington County, with a population of 74.
There are 7 cities in Washington County, Georgia.