6 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Blair | 1 | 8,086 | 7,824 | 0.55% | 1,374 | 6 | City |
| Arlington | 2 | 1,327 | 1,305 | 0.3% | 2,219 | 1 | Village |
| Fort Calhoun | 3 | 1,107 | 1,091 | 0.27% | 1,621 | 1 | City |
| Kennard | 4 | 368 | 382 | -0.54% | 1,333 | 0 | Village |
| Herman | 5 | 230 | 236 | -0.43% | 1,608 | 0 | Village |
| Washington | 6 | 134 | 130 | 0.75% | 641 | 0 | Village |
Blair is the largest city in Washington County, with a population of 8,086.
Washington is the smallest city in Washington County, with a population of 134.
There are 6 cities in Washington County, Nebraska.