There are 21 cities in St. Croix 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 | 2024 Population | 2020 Population | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| River Falls | 1 | 17,154 | 16,277 | 1.29% | 2,367 | 7.2 | City |
| Hudson | 2 | 15,706 | 14,773 | 1.51% | 2,305 | 6.8 | City |
| New Richmond | 3 | 10,883 | 10,169 | 1.66% | 994 | 10.9 | City |
| Baldwin | 4 | 4,390 | 4,292 | 0.55% | 1,363 | 3.2 | Village |
| North Hudson | 5 | 3,914 | 3,810 | 0.67% | 2,499 | 1.6 | Village |
| Somerset | 6 | 3,281 | 3,035 | 1.89% | 989 | 3.3 | Village |
| Osceola | 7 | 2,903 | 2,778 | 1.08% | 714 | 4.1 | Village |
| Roberts | 8 | 2,136 | 1,958 | 2.1% | 828 | 2.6 | Village |
| Hammond | 9 | 1,843 | 1,873 | -0.43% | 853 | 2.2 | Village |
| Spring Valley | 10 | 1,429 | 1,403 | 0.42% | 360 | 4.0 | Village |
| Woodville | 11 | 1,416 | 1,388 | 0.5% | 788 | 1.8 | Village |
| Glenwood City | 12 | 1,302 | 1,308 | -0.15% | 375 | 3.5 | City |
| Clear Lake | 13 | 1,105 | 1,091 | 0.27% | 425 | 2.6 | Village |
| Dresser | 14 | 939 | 937 | 0% | 496 | 1.9 | Village |
| Star Prairie | 15 | 657 | 675 | -0.76% | 307 | 2.1 | Village |
| Knapp | 16 | 495 | 481 | 0.61% | 315 | 1.6 | Village |
| Deer Park | 17 | 244 | 252 | -0.81% | 269 | 0.9 | Village |
| Downing | 18 | 229 | 231 | -0.43% | 77 | 3.0 | Village |
| Wilson | 19 | 203 | 209 | -0.98% | 119 | 1.7 | Village |
| Emerald | 20 | 145 | 227 | -0.69% | 78 | 1.9 | CDP |
| Houlton | 21 | 63 | 105 | -26.74% | 43 | 1.5 | 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.
River Falls is the largest city in St. Croix County.
Houlton is the smallest city in St. Croix County.
There are 21 cities in St. Croix County, Wisconsin.