Rock County, Wisconsin demographics
Population: 163,522
Median age: 39.8
Median household income: 65,518
Demographics, population, home values, social and economic characteristics of Rock County, Wisconsin.
Population
| 2021 | 163,522 |
| 2020 | 162,532 |
| 2019 | 162,152 |
| 2018 | 161,769 |
| 2017 | 161,226 |
| 2016 | 160,986 |
| 2015 | 160,727 |
| 2014 | 160,465 |
| 2013 | 160,345 |
| 2012 | 160,356 |
| 2011 | 160,270 |
| 2010 | 159,964 |
| 2009 | 158,829 |
Rock County, WI cities
Beloit city - 36,567
Brodhead city - 3,247
Clinton village - 1,952
Edgerton city - 5,825
Evansville city - 5,666
Footville village - 1,043
Hanover CDP - 120
Janesville city - 65,506
Milton city - 5,708
Orfordville village - 1,429
Census data for Rock County, Wisconsin
Demographic and housing estimates in Rock County, Wisconsin
| Total population | 163,522 |
| Male | 81,072 |
| Female | 82,450 |
| Total population | 163,522 |
| Under 5 years | 9,732 |
| 5 to 9 years | 10,468 |
| 10 to 14 years | 10,893 |
| 15 to 19 years | 11,036 |
| 20 to 24 years | 9,708 |
| 25 to 34 years | 19,900 |
| 35 to 44 years | 20,434 |
| 45 to 54 years | 21,183 |
| 55 to 59 years | 11,569 |
| 60 to 64 years | 11,545 |
| 65 to 74 years | 16,238 |
| 75 to 84 years | 7,732 |
| 85 years and over | 3,084 |
| Median age (years) | 39.8 |
| Under 18 years | 37,961 |
| 16 years and over | 129,964 |
| 18 years and over | 125,561 |
| 21 years and over | 119,588 |
| 62 years and over | 34,020 |
| 65 years and over | 27,054 |
| Total population | 163,522 |
| One race | 155,117 |
| White | 138,122 |
| Black or African American | 7,823 |
| American Indian and Alaska Native | 426 |
| Asian | 1,940 |
| Native Hawaiian and Other Pacific Islander | 30 |
| Some other race | 6,776 |
| Two or more races | 8,405 |
| Citizen, VOTING AGE 18 and over population | 121,418 |
| Male Citizen, VOTING AGE 18 and over population | 59,207 |
| Female Citizen, VOTING AGE 18 and over population | 62,211 |
Social characteristics in Rock County, Wisconsin
| Total households | 66,030 |
| Family households (families) | 31,219 |
| Married-couple family | 5,383 |
| Male householder, no wife present, family | 11,839 |
| Female householder, no husband present, family | 8,543 |
| Nonfamily households | 17,589 |
| Average household size | 20,056 |
| Average family size | 2.43 |
Economic characteristics in Rock County, Wisconsin
| Total households | 66,030 |
| Less than $10,000 | 2,634 |
| $10,000 to $14,999 | 2,597 |
| $15,000 to $24,999 | 5,413 |
| $25,000 to $34,999 | 5,658 |
| $35,000 to $49,999 | 8,395 |
| $50,000 to $74,999 | 13,447 |
| $75,000 to $99,999 | 10,590 |
| $100,000 to $149,999 | 11,203 |
| $150,000 to $199,999 | 3,844 |
| $200,000 or more | 2,249 |
| Median household income (dollars) | 65,518 |
Housing characteristics in Rock County, Wisconsin
| Total housing units | 69,841 |
| Occupied housing units | 66,030 |
| Vacant housing units | 3,811 |
| Total housing units | 69,841 |
| 1-unit, detached | 51,599 |
| 1-unit, attached | 2,990 |
| 2 units | 4,219 |
| 3 or 4 units | 1,783 |
| 5 to 9 units | 2,495 |
| 10 to 19 units | 1,502 |
| 20 or more units | 3,732 |
| Mobile home | 1,512 |
| Boat, RV, van, etc. | 9 |
| Total housing units | 69,841 |
| Built 2014 or later | 11 |
| Built 2010 to 2013 | 1,977 |
| Built 2000 to 2009 | 7,234 |
| Built 1990 to 1999 | 8,737 |
| Built 1980 to 1989 | 5,281 |
| Built 1970 to 1979 | 10,699 |
| Built 1960 to 1969 | 9,547 |
| Built 1950 to 1959 | 7,994 |
| Built 1940 to 1949 | 4,608 |
| Built 1939 or earlier | 13,753 |
| Total housing units | 69,841 |
| 1 room | 1,131 |
| 2 rooms | 1,077 |
| 3 rooms | 4,555 |
| 4 rooms | 9,889 |
| 5 rooms | 13,987 |
| 6 rooms | 14,224 |
| 7 rooms | 9,442 |
| 8 rooms | 6,715 |
| 9 rooms or more | 8,821 |
| Median rooms | 5.8 |
| Total housing units | 69,841 |
| No bedroom | 1,166 |
| 1 bedroom | 5,366 |
| 2 bedrooms | 18,806 |
| 3 bedrooms | 32,451 |
| 4 bedrooms | 9,340 |
| 5 or more bedrooms | 2,712 |
| Occupied housing units | 66,030 |
| Owner-occupied | 45,717 |
| Renter-occupied | 20,313 |
| Average household size of owner-occupied unit | 2.53 |
| Average household size of renter-occupied unit | 2.23 |
| Occupied housing units | 66,030 |
| Moved in 2017 or later | 5,082 |
| Moved in 2015 to 2016 | 18,930 |
| Moved in 2010 to 2014 | 9,699 |
| Moved in 2000 to 2009 | 14,434 |
| Moved in 1990 to 1999 | 8,942 |
| Moved in 1989 and earlier | 8,943 |
| Owner-occupied units | 45,717 |
| Less than $50,000 | 2,514 |
| $50,000 to $99,999 | 6,850 |
| $100,000 to $149,999 | 9,384 |
| $150,000 to $199,999 | 10,692 |
| $200,000 to $299,999 | 10,105 |
| $300,000 to $499,999 | 4,916 |
| $500,000 to $999,999 | 1,089 |
| $1,000,000 or more | 167 |
| Median (dollars) | 165,800 |
| Owner-occupied units | 45,717 |
| Housing units with a mortgage | 29,337 |
| Housing units without a mortgage | 16,380 |
| Occupied units paying rent | 19,347 |
| Less than $500 | 1,735 |
| $500 to $999 | 10,420 |
| $1,000 to $1,499 | 6,507 |
| $1,500 to $1,999 | 476 |
| $2,000 to $2,499 | 47 |
| $2,500 to $2,999 | 0 |
| $3,000 or more | 162 |
| Median (dollars) | 892 |
| No rent paid | 966 |
Demographic data for Rock County, WI and each city in the county. Lists of cities by population, wealth and poverty in Rock County, WI.
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