| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| West Bend | 1 | 32,366 | 31,730 | 0.3% | 2,078 | 16 | City |
| Germantown | 2 | 21,078 | 20,916 | 0.13% | 613 | 34 | Village |
| Hartford | 3 | 16,085 | 15,654 | 0.5% | 1,797 | 9 | City |
| Richfield | 4 | 11,792 | 11,753 | 0.06% | 328 | 36 | Village |
| Jackson | 5 | 8,397 | 7,866 | 0.9% | 2,174 | 4 | Village |
| Slinger | 6 | 6,591 | 6,040 | 1.48% | 1,200 | 5 | Village |
| Kewaskum | 7 | 4,623 | 4,312 | 1.36% | 1,964 | 2 | Village |
| Newburg | 8 | 1,125 | 1,136 | -0.35% | 1,169 | 1 | Village |
| Chenequa | 9 | 522 | 517 | 0.19% | 151 | 3 | Village |
West Bend is the largest city in Washington County, with a population of 32,366.
Chenequa is the smallest city in Washington County, with a population of 522.
There are 9 cities in Washington County, Wisconsin.