Grundy County IL Information


Grundy County Subdivisions

Grundy County IL Data & Demographics (As of July 1, 2018)


Total Population 51,671
Population in Households 51,417
Population in Familes 43,700
Population in Group Qrtrs 254
Population Density1 124
Diversity Index2 31


Median Household Income $70,802
Average Household Income $85,531
Per Capita Income $31,928


Total Housing Units 20,872 (100%)
Owner Occupied HU 13,921 (66.7%)
Renter Occupied HU 5,258 (25.2%)
Vacant Housing Units 1,693 ( 8.1%)
Median Home Value $196,931
Average Home Value $224,973


Total Households 19,179
Average Household Size 2.68
Family Households 13,723
Average Family Size 3
  1. Population Density = Total Population per square mile.
  2. 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 0.38% 0.49%
Households 0.41% 0.5%
Families 0.26% 0.4%
Median Household Income   2.07%
Per Capita Income   2.63%


Grundy County IL - Peer Comparisons by Rank and Percentile

The table below compares Grundy County to the other 102 counties and county equivalents in Illinois by rank and percentile using July 1, 2018 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 # 29 73rd
Population Density # 22 79th
Diversity Index # 32 70th
Median Household Income # 8 93rd
Per Capita Income # 14 87th

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