Winnebago County IL Information


Winnebago County Subdivisions

Winnebago County IL Data & Demographics (As of July 1, 2016)


Total Population 292,909
Population in Households 288,224
Population in Familes 232,176
Population in Group Qrtrs 4,685
Population Density1 571
Diversity Index2 55


Total Households 115,117
Average Household Size 2.5
Family Households 75,826
Average Family Size 3


Total Housing Units 126,898 (100%)
Owner Occupied HU 76,393 (60.2%)
Renter Occupied HU 38,724 (30.5%)
Vacant Housing Units 11,781 ( 9.3%)
Median Home Value $121,542
Average Home Value $141,215


Median Household Income $48,453
Average Household Income $64,046
Per Capita Income $25,652
  (Compound Annual Growth Rates)


2010-2015 2015-2020
Population -0.13% -0.09%
Households -0.05% -0.05%
Families -0.22% -0.15%
Median Household Income   -0.7%
Per Capita Income   1.2%
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.


Winnebago County IL - Peer Comparisons by Rank and Percentile

The table below compares Winnebago County to the other 102 counties and county equivalents in Illinois by rank and percentile using July 1, 2016 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 # 7 94th
Population Density1 # 6 95th
Diversity Index2 # 7 94th
Median Household Income # 47 55th
Per Capita Income # 45 58th

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