Rock County WI Information


Rock County Subdivisions

Rock County WI Data & Demographics (As of July 1, 2015)


Total Population 160,208
Population in Households 157,328
Population in Familes 126,731
Population in Group Qrtrs 2,880
Population Density1 223
Diversity Index2 36


Total Households 63,303
Average Household Size 2.49
Family Households 42,422
Average Family Size 3


Total Housing Units 69,002 (100%)
Owner Occupied HU 43,522 (63.1%)
Renter Occupied HU 19,781 (28.7%)
Vacant Housing Units 5,699 ( 8.3%)
Median Home Value $129,473
Average Home Value $145,453


Median Household Income $48,219
Average Household Income $61,353
Per Capita Income $24,403
  (Compound Annual Growth Rates)


2010-2015 2015-2020
Population -0.01% 0.08%
Households 0.12% 0.11%
Families 0.0% 0.04%
Median Household Income   2.73%
Per Capita Income   2.68%
1) Population Density = Total Population per square mile.
2) The Diversity Index is a scale of 0 to 100 that represents the likelyhood 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.
Based on Census 2010 counts, the Diversity Index for the United States was 60.6 and it is expected to increase to 64.8 by July 1, 2018.


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, 2015 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 Density1 # 13 83rd
Diversity Index2 # 7 92nd
Median Household Income # 37 50th
Per Capita Income # 42 43rd

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