10 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| West Bend | 1 | 32,006 | 31,706 | 0.19% | 2,055 | 16 | City |
| Germantown | 2 | 21,112 | 20,882 | 0.22% | 614 | 34 | Village |
| Hartford | 3 | 16,023 | 15,700 | 0.41% | 1,790 | 9 | City |
| Richfield | 4 | 11,904 | 11,746 | 0.27% | 331 | 36 | Village |
| Jackson | 5 | 8,101 | 7,848 | 0.63% | 2,097 | 4 | Village |
| Slinger | 6 | 6,572 | 6,049 | 1.62% | 1,197 | 5 | Village |
| Kewaskum | 7 | 4,513 | 4,317 | 0.87% | 1,917 | 2 | Village |
| Newburg | 8 | 1,124 | 1,144 | -0.35% | 1,168 | 1 | Village |
| Allenton | 9 | 838 | 759 | 0.12% | 537 | 2 | CDP |
| Chenequa | 10 | 548 | 528 | 0.74% | 158 | 3 | Village |
West Bend is the largest city in Washington County, with a population of 32,006.
Chenequa is the smallest city in Washington County, with a population of 548.
There are 10 cities in Washington County, Wisconsin.