Rock County WI Information


Rock County Subdivisions

Rock County WI Data & Demographics (As of July 1, 2017)


Total Population 162,214
Daytime Population: Workers 68,014
Daytime Population: Residents 80,722
Total Daytime Population (TDP) 148,736
Ratio TDP/Total Population1 0.92
Population in Households 159,505
Population in Familes 128,064
Population in Group Qrtrs 2,709
Population Density2 226
Diversity Index3 38


Median Household Income $52,916
Average Household Income $66,232
Per Capita Income $26,442


Total Housing Units 69,223 (100%)
Owner Occupied HU 43,417 (62.7%)
Renter Occupied HU 20,790 (30.0%)
Vacant Housing Units 5,016 ( 7.2%)
Median Home Value $144,371
Average Home Value $175,475


Total Households 64,207
Average Household Size 2.48
Family Households 42,933
Average Family Size 3
  1. If the ratio of the TDP to Total Population is greater than 1, the location gains population during the day when commuting workers are present. If the ratio is less than 1, the location is more of a bedroom community where people commute to another place for work.
  2. Population Density = Total Population per square mile.
  3. The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different race or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.


2010-2017 2017-2022
Population 0.16% 0.24%
Households 0.28% 0.31%
Families 0.17% 0.24%
Median Household Income   2.47%
Per Capita Income   2.92%


Rock County WI - Peer Comparisons by Rank and Percentile

The table below compares Rock County to the other 72 counties and county equivalents in Wisconsin by rank and percentile using July 1, 2017 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description Rank Percentile
Total Population # 9 89th
Population Density # 13 83rd
Diversity Index # 7 92nd
Median Household Income # 38 49th
Per Capita Income # 45 39th

Additional comparisons and rankings can be made with a VERY EASY TO USE Wisconsin Census Data Comparison Tool.