| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Greenville | 1 | 25,923 | 29,497 | -2.29% | 964 | 27 | City |
| Leland | 2 | 3,475 | 3,950 | -2.25% | 970 | 4 | City |
| Hollandale | 3 | 2,042 | 2,320 | -2.3% | 921 | 2 | City |
| Metcalfe | 4 | 718 | 815 | -2.31% | 716 | 1 | Town |
| Arcola | 5 | 270 | 303 | -2.17% | 1,233 | 0 | Town |
Greenville is the largest city in Washington County, with a population of 25,923.
Arcola is the smallest city in Washington County, with a population of 270.
There are 5 cities in Washington County, Mississippi.