St. Croix County, Wisconsin Zip Codes
| Hudson | 33,465 |
| New Richmond | 19,652 |
| Somerset | 7,200 |
| Baldwin | 6,791 |
| Roberts | 4,715 |
| Hammond | 3,863 |
| Glenwood City | 3,428 |
| Woodville | 2,675 |
| Houlton | 1,805 |
| Wilson | 1,107 |
| Deer Park | 1,042 |
- Population is the most recent figure from the U.S. Census Bureau's 2022 American Community Survey (ACS) 5-Year Estimates.