Grundy County IL Information


Grundy County Subdivisions

Grundy County IL Data & Demographics (As of July 1, 2017)


Total Population 51,760
Daytime Population: Workers 19,161
Daytime Population: Residents 26,000
Total Daytime Population (TDP) 45,161
Ratio TDP/Total Population1 0.87
Population in Households 51,506
Population in Familes 43,659
Population in Group Qrtrs 254
Population Density2 124
Diversity Index3 31


Median Household Income $69,070
Average Household Income $84,121
Per Capita Income $31,268


Total Housing Units 20,840 (100%)
Owner Occupied HU 13,999 (67.2%)
Renter Occupied HU 5,129 (24.6%)
Vacant Housing Units 1,712 ( 8.2%)
Median Home Value $191,170
Average Home Value $214,494


Total Households 19,128
Average Household Size 2.69
Family Households 13,714
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 0.46% 0.55%
Households 0.43% 0.53%
Families 0.29% 0.43%
Median Household Income   2.41%
Per Capita Income   2.65%


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, 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 # 30 72nd
Population Density # 22 79th
Diversity Index # 32 70th
Median Household Income # 8 93rd
Per Capita Income # 13 88th

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