Grundy County, Illinois
Grundy County, Illinois, has 54,052 residents (July 2025 estimate). Its county seat is Morris. It uses Central Time and covers 418 sq mi (1,083 km²) of land.
- Resident population, July 2025
- 54,052
- Land area
- 418 sq mi (1,083 km²)
- County seat or government
- Morris
- Time zone
- Central TimeUTC-06:00 in January; UTC-05:00 in July
- Median household income
- $92,235 ± $7,255
- Median home value
- $271,700 ± $10,409
- Median rent, with utilities
- $1,177 ± $59
- Homes lived in by their owners
- 74.4% ± 2.0 points
- County type
- County
- Metro or micro area
- Chicago-Naperville-Elgin, IL-IN metro areaOutlying county
- Water area
- 12.4 sq mi (32.1 km²)
- State
- Illinois
- County code (FIPS)
- 17063
- Coordinates (central point)
- 41.292410, -88.401054
These coordinates mark a central point for the area, not a street address. Income, home value, rent and homes lived in by their owners: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, ± margin at 90% confidence; checked on October 13, 2026.
Time zones in Grundy County
| Time zone | Local time and UTC offset | Next clock change |
|---|---|---|
| Central TimeAmerica/Chicago | UTC-06:00 in January; UTC-05:00 in July. Enable JavaScript for the live clock. | Enable JavaScript for upcoming changes. |
Near a time-zone line, check where you are with the time-zone finder. Your phone’s setting can differ.
ZIP Code areas, largest first
- 6045020,783 people
- 6044716,102 people
- 6041014,239 people
- 6048111,195 people
- 604169,550 people
- 604204,682 people
- 613603,610 people
- 605413,342 people
- 604242,153 people
- 604441,901 people
- 604071,812 people
- 60961740 people
16 ZIP Code areas overlap Grundy County. People counts are 2020–2024 estimates for each whole ZIP area. Mailing ZIPs can differ; check an address with USPS ZIP Code Lookup.
Official county information
We don’t have a website for this county yet. The US government’s local-office directory ↗ lists its offices. A geographic lookup cannot determine eligibility, tax liability or a court obligation.
Townships in Grundy County, largest first
- Aux Sable Township15,630 people
- Morris Township7,239 people
- Braceville Township6,529 people
- Saratoga Township6,483 people
- Felix Township4,469 people
- Wauponsee Township2,742 people
- Erienna Township2,626 people
- Mazon Township1,663 people
- Garfield Township1,511 people
- Goose Lake Township1,170 people
- Nettle Creek Township805 people
- Greenfield Township789 people
All 17
- Vienna Township600 people
- Highland Township285 people
- Norman Township243 people
- Goodfarm Township234 people
- Maine Township201 people
People counts are American Community Survey 2020–2024 5-year estimates. All townships in Illinois, by county
School districts in Grundy County, largest first
- Minooka Community High School District 11144,775 people
- Minooka Community Consolidated School District 20131,134 people
- Morris Community High School District 10119,472 people
- Morris School District 5411,787 people
- Coal City Community Unit School District 110,930 people
- Herscher Community Unit School District 210,230 people
- Seneca Township High School District 1607,207 people
- Saratoga Community Consolidated School District 60C6,533 people
- Dwight Township High School District 2305,046 people
- Dwight Common School District 2324,777 people
- Gardner-South Wilmington Township High School District3,733 people
- Newark Community High School District 183,625 people
All 20
- Seneca Community Consolidated School District 1703,597 people
- Miller Township Community Consolidated School District2,684 people
- Mazon-Verona-Kinsman Elementary School District 2C2,611 people
- Gardner Community Consolidated School District 72C1,694 people
- Braceville School District 751,358 people
- Nettle Creek Community Consolidated School District 24C1,310 people
- Lisbon Community Consolidated School District 901,181 people
- South Wilmington Consolidated School District 74681 people
Districts with land in the county; a district can cross county lines. People counts are American Community Survey 2020–2024 5-year estimates. A district boundary doesn’t decide which school a student attends.
Cities, towns and communities, largest first
These areas overlap the mapped boundary; an overlap does not mean that every address belongs to both.
- Morris, Illinois (city)14,898 people
- Channahon, Illinois (village)13,927 people
- Minooka, Illinois (village)12,891 people
- Braidwood, Illinois (city)6,062 people
- Coal City, Illinois (village)5,317 people
- Dwight, Illinois (village)3,872 people
- Diamond, Illinois (village)2,984 people
- Seneca, Illinois (village)2,450 people
- Gardner, Illinois (village)1,410 people
- Mazon, Illinois (village)1,401 people
- Braceville, Illinois (village)860 people
- Godley, Illinois (village)602 people
All 17
- South Wilmington, Illinois (village)600 people
- Carbon Hill, Illinois (village)441 people
- Verona, Illinois (village)272 people
- Kinsman, Illinois (village)84 people
- East Brooklyn, Illinois (village)50 people
Bordering areas, nearest first
Distances are straight lines between map points.
- Kendall County, Illinois20 mi north
- Will County, Illinois24 mi northeast
- LaSalle County, Illinois25 mi west
- Livingston County, Illinois29 mi south
- Kankakee County, Illinois30 mi east
Before using this answer on a form
Use a precise point for address-level questions. A device accuracy circle can cross a boundary; confirm tax, voting or jury details with the responsible office.
Find the county where you are now, check its ZIP area, or check the time zone where you are.
Areas that only touch the edge
These areas meet the boundary only along a sliver. Most addresses here are not in them; for an address near the line, check with the county.