| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Blair | 1 | 8,043 | 7,824 | 0.58% | 1,367 | 6 | City |
| Arlington | 2 | 1,333 | 1,308 | 0.3% | 2,229 | 1 | Village |
| Fort Calhoun | 3 | 1,111 | 1,091 | 0.27% | 1,627 | 1 | City |
| Kennard | 4 | 368 | 379 | -0.54% | 1,333 | 0 | Village |
| Herman | 5 | 215 | 224 | -0.92% | 1,503 | 0 | Village |
| Washington | 6 | 131 | 129 | 0% | 627 | 0 | Village |
Blair is the largest city in Washington County, with a population of 8,043.
Washington is the smallest city in Washington County, with a population of 131.
There are 6 cities in Washington County, Nebraska.