There are 31 cities in Washington County, Wisconsin.
Note: As defined by the US Census Bureau, a city's official boundaries often extend miles beyond the city itself and may even cross county lines. As such, several thousand US cities officially exist in two or more counties (and therefore appear on multiple counties' lists of cities.)
City | Rank | State | 2024 Population | 2020 Census | Annual Change | Density (mi²) | Area (mi²) |
|---|---|---|---|---|---|---|---|
| Milwaukee | 1 | Wisconsin | 550,099 | 576,511 | -1.19% | 5,720 | 96.17 |
| West Bend | 2 | Wisconsin | 31,504 | 31,704 | -0.16% | 2,023 | 15.57 |
| Germantown | 3 | Wisconsin | 21,151 | 20,879 | 0.32% | 615 | 34.38 |
| Oconomowoc | 4 | Wisconsin | 18,767 | 18,243 | 0.7% | 1,596 | 11.76 |
| Hartford | 5 | Wisconsin | 15,958 | 15,700 | 0.41% | 1,782 | 8.95 |
| Grafton | 6 | Wisconsin | 12,781 | 12,085 | 1.38% | 2,440 | 5.24 |
| Cedarburg | 7 | Wisconsin | 12,675 | 12,167 | 1.01% | 2,576 | 4.92 |
| Richfield | 8 | Wisconsin | 11,966 | 11,744 | 0.47% | 333 | 35.91 |
| Hartland | 9 | Wisconsin | 10,443 | 9,509 | 2.29% | 1,913 | 5.46 |
| Jackson | 10 | Wisconsin | 8,102 | 7,848 | 0.8% | 2,097 | 3.86 |
| Delafield | 11 | Wisconsin | 7,161 | 7,193 | -0.11% | 761 | 9.41 |
| Slinger | 12 | Wisconsin | 6,545 | 6,043 | 1.96% | 1,192 | 5.49 |
| Summit | 13 | Wisconsin | 5,469 | 4,827 | 3.03% | 265 | 20.66 |
| Okauchee Lake | 14 | Wisconsin | 4,890 | 4,373 | 2.09% | 1,310 | 3.73 |
| Kewaskum | 15 | Wisconsin | 4,507 | 4,317 | 1.08% | 1,915 | 2.35 |
| Merton | 16 | Wisconsin | 3,542 | 3,456 | 0.63% | 1,068 | 3.32 |
| Dousman | 17 | Wisconsin | 2,385 | 2,425 | -0.42% | 801 | 2.98 |
| Fredonia | 18 | Wisconsin | 2,294 | 2,272 | 0.26% | 1,026 | 2.24 |
| Campbellsport | 19 | Wisconsin | 1,935 | 1,905 | 0.41% | 1,417 | 1.37 |
| Random Lake | 20 | Wisconsin | 1,575 | 1,563 | 0.19% | 1,049 | 1.50 |
| Nashotah | 21 | Wisconsin | 1,303 | 1,319 | -0.31% | 801 | 1.63 |
| Theresa | 22 | Wisconsin | 1,258 | 1,252 | 0.16% | 1,705 | 0.74 |
| Newburg | 23 | Wisconsin | 1,129 | 1,141 | -0.27% | 1,174 | 0.96 |
| Allenton | 24 | Wisconsin | 911 | 759 | 4.35% | 584 | 1.56 |
| Ashippun | 25 | Wisconsin | 883 | 1,027 | -3.92% | 859 | 1.03 |
| Oconomowoc Lake | 26 | Wisconsin | 598 | 572 | 1.18% | 312 | 1.92 |
| Chenequa | 27 | Wisconsin | 545 | 527 | 0.93% | 157 | 3.46 |
| Adell | 28 | Wisconsin | 486 | 500 | -0.61% | 871 | 0.56 |
| Waubeka | 29 | Wisconsin | 432 | 624 | -10% | 176 | 2.45 |
| Lac La Belle | 30 | Wisconsin | 288 | 278 | 1.05% | 260 | 1.11 |
| North Lake | 31 | Wisconsin | 118 | 300 | -27.61% | 494 | 0.24 |
Note: City markers shown outside the county boundary mean that a part of the city extends into this county, but is primarily located in an adjacent county.
Milwaukee is the largest city in Washington County.
North Lake is the smallest city in Washington County.
There are 31 cities in Washington County, Wisconsin.