Rock County, Wisconsin
Rock County, Wisconsin · ZIP 53114, 53190, 53501
- Census data · ACS 2019-2023
- 165,461 (2024 estimate)Population
- 66,652Households
- $74,390Median household income
- $215,900Median home value
- 31Towns with a page
- 16ZIP codes
Rock County in numbersOfficial sources, refreshed yearly
| Census | Population |
|---|---|
| 2000 | 152,307 |
| 2010 | 160,331 |
| 2020 | 163,687 |
As counted at each census, within the boundaries the area had then; the current estimate is in the glance card.
Sources: Census 2000 Summary File 1: total population, county level, state 55, retrieved November 14, 2026; Census 2010 Summary File 1: total population, county level, state 55, retrieved November 14, 2026; Census 2020 Redistricting Data (P.L. 94-171): total population, county level, state 55, retrieved November 14, 2026.
Median household income $74,390 · Share of households by income, American Community Survey 5-year 2019-2023, table S1901.
Source: American Community Survey 5-year subject table S1901 (household income) 2019–2023, county level, state 55, retrieved November 14, 2026.
- Owner occupied
- 47,086 units
- Renter occupied
- 19,566 units
- Vacancy rate
- 5.7%
Occupied housing units by tenure and the share of all units vacant, American Community Survey 5-year 2019-2023, table DP04.
Source: American Community Survey 5-year data profile 2019–2023, county level, state 55, retrieved November 14, 2026.
64,537 employees in 3,362 establishments with payroll in 2023, all sectors; employers themselves are not named in the source. County Business Patterns counts are published with noise.
Source: County Business Patterns 2023: employment by sector, county level, state 55, retrieved November 14, 2026.
| Measure | Rock County | Wisconsin |
|---|---|---|
| Population | 163,944 | 5,892,023 |
| Median household income | $74,390 | $75,670 |
| Median age | 40.1 | 40.1 |
| Median home value | $215,900 | $247,400 |
| Bachelor’s degree or higher | 25.7% | 32.8% |
| Foreign-born residents | 4.8% | 5.1% |
| Owner-occupied homes | 70.6% | 67.9% |
| Mean commute to work | 23.6 minutes | 22.2 minutes |
Source: American Community Survey 5-year data profile 2019–2023, county level, state 55, retrieved November 14, 2026.
Townships, towns and villages in Rock County31 with a page · sort by any column
| Type | |||
|---|---|---|---|
| Janesville | City | 66,428 | 34.6 sq mi |
| Beloit | City | 36,633 | 17.4 sq mi |
| Beloit Town | Town | 7,904 | 26.2 sq mi |
| Edgerton | City | 6,138 | 4.16 sq mi |
| Evansville | City | 5,819 | 3.71 sq mi |
| Milton | City | 5,778 | 4.75 sq mi |
| Janesville Town | Town | 3,692 | 26.8 sq mi |
| Fulton Town | Town | 3,667 | 31.4 sq mi |
| Milton Town | Town | 3,122 | 29.5 sq mi |
| Rock Town | Town | 3,037 | 26.2 sq mi |
| Harmony Town | Town | 2,561 | 21.5 sq mi |
| Turtle Town | Town | 2,392 | 28.3 sq mi |
| Clinton | Village | 2,302 | 1.44 sq mi |
| Union Town | Town | 2,105 | 32.6 sq mi |
| Orfordville | Village | 1,598 | 1.19 sq mi |
| Newark Town | Town | 1,511 | 36.3 sq mi |
| Lima Town | Town | 1,281 | 36.2 sq mi |
| Plymouth Town | Town | 1,172 | 35.5 sq mi |
| Center Town | Town | 1,042 | 35.7 sq mi |
| Bradford Town | Town | 1,000 | 36.0 sq mi |
| Porter Town | Town | 977 | 35.9 sq mi |
| Footville | Village | 899 | 1.13 sq mi |
| Clinton Town | Town | 877 | 35.2 sq mi |
| La Prairie Town | Town | 780 | 34.5 sq mi |
| Johnstown Town | Town | 766 | 36.0 sq mi |
| Magnolia Town | Town | 743 | 35.9 sq mi |
| Spring Valley Town | Town | 723 | 34.8 sq mi |
| Avon Town | Town | 574 | 35.5 sq mi |
| Hanover | Census designated place | 143 | 0.58 sq mi |
| Shopiere | Census designated place | 141 | 0.22 sq mi |
| Fulton | Census designated place | 52 | 0.16 sq mi |
Populations: Census Population Estimates, Vintage 2024: subcounty totals, state 55 (2024). Land areas: Census Gazetteer 2025: counties. A dash means the figure is not in the cited file.
County officialsFrom public records
No county official is published yet. Names appear once a researcher drafts them from the county’s own site and a second person approves; office contacts only, never personal details.
Across Rock County
No job is posted in Rock County’s towns yet. Employers post from their business dashboard; public job banks are added once their terms are recorded.
No upcoming event is listed in Rock County's towns yet. Members and businesses add events from any town page.
Nothing has been posted in Rock County’s towns yet. Join a town to start its feed.
Neighboring counties
Neighboring counties
- Boone CountyPopulation 53,313 (2024 estimate)
- Dane CountyPopulation 588,347 (2024 estimate)
- Green CountyPopulation 37,183 (2024 estimate)
- Jefferson CountyPopulation 86,245 (2024 estimate)
- Walworth CountyPopulation 106,029 (2024 estimate)
- Winnebago CountyPopulation 283,790 (2024 estimate)
Sources: Census county adjacency file 2024, retrieved November 14, 2026; Census Population Estimates, Vintage 2024: subcounty totals, state 17, retrieved November 14, 2026; Census Population Estimates, Vintage 2024: subcounty totals, state 55, retrieved November 14, 2026.