County in Illinois
Grundy County
About 53,200 people, median household income $92,200.
District lines run through Grundy County, so who represents you here depends on where you live. Search your address to see yours.
Who lives in Grundy County
Census survey estimates for 2020 to 2024, rounded.
People
- Population
- 53,200
- Median age
- 38.3 years
- Under 18
- 24%
- 65 and over
- 15%
- Veterans, of adults
- 7%
- Speak another language at home
- 9%
Race and ethnicity
- Hispanic or Latino, of any race
- 12%
- White, not Hispanic
- 82%
- Black, not Hispanic
- 2%
- Asian, not Hispanic
- 1%
Income and housing
- Median household income
- $92,200
- Below the poverty line
- 6%
- Bachelor's or higher, adults 25+
- 24%
- Owner-occupied homes
- 74%
- Median home value
- $272,000
2024 vote for president
- Donald Trump, Republican
- 63.9%
- Kamala Harris, Democrat
- 34.4%
- Other candidates
- 1.7%
Votes counted, by precinct. Source: MIT Election Data and Science Lab, precinct returns (public domain).
Represent all of Grundy County
Grundy County's districts (7)
U.S. House (1)
- U.S. House District 16
Held by Darin LaHood, Republican
All of Grundy County
Illinois Senate (3)
- Illinois Senate District 38
Held by Sue Rezin, Republican
Part of Grundy County: 22,828 people in 2020
- Illinois Senate District 40
Held by Patrick Joyce, Democratic
Part of Grundy County: 1,979 people in 2020
- Illinois Senate District 53
Held by Chris Balkema, Republican
Part of Grundy County: 27,726 people in 2020
Illinois House (3)
- Illinois House District 75
Held by Jed Davis, Republican
Part of Grundy County: 22,828 people in 2020
- Illinois House District 79
Held by Jackie Haas, Republican
Part of Grundy County: 1,979 people in 2020
- Illinois House District 106
Held by Jason Bunting, Republican
Part of Grundy County: 27,726 people in 2020
Towns (17)
Cities, villages and unincorporated communities, with the number of people in the county’s part of each at the 2020 Census.
- Morris14,163
- Minooka (part)9,627
- Coal City (part)5,704
- Channahon (part)4,098
- Diamond (part)2,636
- Gardner1,366
- Mazon979
- Braceville (part)724
- South Wilmington710
- Carbon Hill372
- Verona208
- Kinsman90
- East Brooklyn80
- Godley (part)47
- Dwight (part)14
- Seneca (part)6
- Braidwood (part)5
Source: U.S. Census Bureau, American Community Survey 5-year estimates, 2020–2024; towns and counties from the 2020 Census, Demographic and Housing Characteristics. Figures rounded by us. Retrieved 2026-10-19. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.