| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Salem | 1 | 6,402 | 6,540 | -0.39% | 1,516 | 4 | City |
| Campbellsburg | 2 | 540 | 534 | 0.19% | 544 | 1 | Town |
| Little York | 3 | 199 | 194 | 0.51% | 203 | 1 | Town |
Salem is the largest city in Washington County, with a population of 6,402.
Little York is the smallest city in Washington County, with a population of 199.
There are 3 cities in Washington County, Indiana.