| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Springfield | 1 | 3,065 | 2,867 | 1.06% | 659 | 5 | City |
| Willisburg | 2 | 304 | 300 | 0.33% | 443 | 1 | City |
| Mackville | 3 | 207 | 204 | 0% | 511 | 0 | City |
Springfield is the largest city in Washington County, with a population of 3,065.
Mackville is the smallest city in Washington County, with a population of 207.
There are 3 cities in Washington County, Kentucky.