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 | 2024 Pop. | 2020 Pop. | Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Whitewater | 1 | 15,458 | 16,134 | -1.08% | 1,749 | 8.8 | City |
| Elkhorn | 2 | 10,217 | 10,267 | -0.13% | 1,264 | 8.1 | City |
| Lake Geneva | 3 | 8,812 | 8,299 | 1.47% | 1,284 | 6.9 | City |
| Delavan | 4 | 8,522 | 8,525 | -0.01% | 1,150 | 7.4 | City |
| East Troy | 5 | 4,713 | 4,689 | 0.13% | 1,033 | 4.6 | Village |
| Williams Bay | 6 | 2,987 | 2,963 | 0.2% | 1,079 | 2.8 | Village |
| Delavan Lake | 7 | 2,972 | 2,752 | 0.78% | 707 | 4.2 | CDP |
| Genoa City | 8 | 2,936 | 2,982 | -0.41% | 1,109 | 2.6 | Village |
| Walworth | 9 | 2,815 | 2,767 | 0.43% | 1,639 | 1.7 | Village |
| Como | 10 | 2,255 | 2,064 | -1.18% | 802 | 2.8 | CDP |
| Fontana-on-Geneva Lake | 11 | 1,896 | 1,871 | 0.32% | 565 | 3.4 | Village |
| Lauderdale Lakes | 12 | 1,653 | 1,437 | 2.16% | 385 | 4.3 | CDP |
| Darien | 13 | 1,568 | 1,574 | -0.13% | 1,215 | 1.3 | Village |
| Sharon | 14 | 1,558 | 1,586 | -0.45% | 901 | 1.7 | Village |
| Lyons | 15 | 1,371 | 1,117 | 7.7% | 1,101 | 1.2 | CDP |
| Lake Lorraine | 16 | 284 | 259 | -1.04% | 254 | 1.1 | CDP |
| Springfield | 17 | 159 | 131 | 0% | 236 | 0.7 | CDP |
| Big Foot Prairie | 18 | 116 | 77 | 8.41% | 3,625 | 0.0 | CDP |
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.
Whitewater is the largest city in Walworth County.
Big Foot Prairie is the smallest city in Walworth County.
There are 18 cities in Walworth County, Wisconsin.