Janesville city, Wisconsin
Official LSAD Designation: Janesville city • Census GEOID: 5537825
• Rock County
Janesville city is an incorporated city in Rock County, Wisconsin. According to official records from the Census (2025), Janesville city had an estimated population of 66,929 residents. Official Census Bureau geographic records classify this community under LSAD designation Janesville city (GEOID 5537825).
Local Government Administration U.S. Census Bureau GMAF
City Of Janesville
Municipal
Address:
18 N JACKSON ST, PO BOX 5005, JANESVILLE WI 53547-5005
County Of Rock
County
Official Title:
Planner Iii
Address:
51 S MAIN ST, JANESVILLE WI 53545-3978
Civic & Statistical Snapshot
| Category | Estimate | Survey Period / Source |
|---|---|---|
| Total Population | 66,929 | 2025 |
| Median Household Income | $73,446 | 2020-2024 |
| Median Home Value | $223,400 | 2020-2024 |
| Land Area | 34.65 sq mi | Gazetteer (2026) |
| Civic & Public Services | Hospitals, Libraries, Colleges | CMS / IMLS / IPEDS |
| Schools & Districts | NCES Directory Listings | Provided by k12guides.com |
| Nearby Airports | Landing Facilities | Provided by airport-data.com |
| Climate & Weather | NOAA 30-Year Normals | 1991–2020 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).