Grundy County, Illinois
Grundy County: county in Illinois, United States
About
Grundy County is a county located in the U.S. state of Illinois. As of the 2010 census, the population was 50,063 and a population density of 45 people per km². After 10 years in 2020 county had an estimated population of 50,993 inhabitants. Its county seat is Morris. The county was created 185 years ago in 1841.
County Snapshot
Grundy County at a glance
Grundy County currently has 15 quality-checked populated place pages linked on MapSof, making it easier to jump from the county overview into local city pages.
Mapped populated places
15
These counts use a stricter populated-place filter so the main lists stay focused on real city and town pages.
Illinois counties
102
Open related pagesLargest city
MorrisPopulation 15,162
Top linked places
Quick Facts about Grundy County
| Population | 50,993 (2020) |
| Country | United States of America |
| State | Illinois (United States) |
| Different from | Grundy County, Grundy County, Grundy County |
| Area | 1115 km2 |
| Water as percent of area | 2.9% |
| Land as percent of area | 97.1% |
| Latitude & Longitude | 41.2851,-88.4185 |
| Named for | Felix Grundy |
| Altitude | 568 feet / 173 meters |
| Capital | Morris |
| Establishment | February 17, 1841 |
| Time Zone | America/Chicago |
| Local time | 21:56:37 (18th April 2026) |
| Density | 46 Pop. per km² as of 2020 |
| Population growth | 1.82% (2010-2020) |
| Weather | 56℉ Rain Showers 7-days weather |
Geography
Grundy County is located at 41°17'6"N 88°25'7"W (41.2850900, -88.4185000). It has 4 neighbors: Kankakee County, La Salle County, Livingston County and Will County.
Grundy County map
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The largest city of Grundy County is Morris with a population of 15,162. Other cities include, Minooka population 11,456, Coal City population 5,351, Diamond population 2,484 and Wauponsee population 2,329. See all Grundy County cities & populated places.
Grundy County Populated Places
Cities, towns, neighborhoods & other populated places in Grundy County.
| City Name | Population | Title |
|---|---|---|
| Morris | 15,162 | City in Illinois |
| Aux Sable | 13,493 | Township in Grundy County, Illinois |
| Minooka | 11,456 | City in Illinois, United States of America |
| Coal City | 5,351 | Village in United States of America |
| Diamond | 2,484 | Village in Illinois, USA |
| Wauponsee | 2,329 | Unincorporated community in Illinois |
| Mazon | 1,860 | Village in the United States |
| Gardner | 1,377 | Village in Illinois, United States |
| Braceville | 709 | Township in Grundy County, Illinois |
| South Wilmington | 637 | Human settlement in Illinois, United States of America |
| Nettle Creek | 484 | Township in Grundy County, Illinois |
| Carbon Hill | 334 | Human settlement in Illinois, United States of America |
| Verona | 208 | Village in Illinois, United States |
| East Brooklyn | 104 | Village in Illinois, United States |
| Kinsman | 96 | Village in Illinois, United States |
Weather
Rain showers before 1pm. Partly sunny, with a high near 56. West northwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is...
7-Day ForecastOfficial website of Grundy County
Official WebsiteDemographics
The population of Grundy County increased by 1.82% in 10 years.
| Year | Population | % Change | Method |
|---|---|---|---|
| 2010 | 50,063 | - | census |
| 2011 | 50,099 | 0.07% | estimation process |
| 2012 | 50,160 | 0.12% | estimation process |
| 2013 | 50,187 | 0.05% | estimation process |
| 2014 | 50,287 | 0.2% | estimation process |
| 2015 | 50,363 | 0.15% | estimation process |
| 2016 | 50,317 | -0.09% | estimation process |
| 2017 | 50,622 | 0.6% | estimation process |
| 2018 | 50,973 | 0.69% | estimation process |
| 2019 | 51,054 | 0.16% | estimation process |
| 2020 | 50,993 | -0.12% | estimation process |
People born in Grundy County (2)
People born in Grundy County, including middle and long distance runner Frank Verner, Carlos Avery, .
More notable people
Other places with the same name (3)
- Grundy County, Tennessee county in Tennessee, United States with a population of 13,485 people.
- Grundy County, Iowa county in Iowa, United States with a population of 12,217 people.
- Grundy County, Missouri county in Missouri, United States with a population of 9,595 people.
Illinois Other Counties (more counties)
| County Name | Population | Title |
|---|---|---|
| Cook County | 5,108,284 | County in Illinois, United States |
| Chicago | 2,677,643 | The third most populous city in the United States and the center of the Chicago metropolitan area. |
| DuPage County | 917,481 | County in Illinois, United States |
| Lake County | 693,593 | County in Oregon, United States |
| Will County | 688,726 | County in Illinois, United States |
| Kane County | 531,010 | County in southern Utah, United States |
| McHenry County | 305,888 | County in Illinois, United States |
| Winnebago County | 281,295 | County in Illinois, United States |
| Madison County | 262,635 | County in Montana, United States |
| Saint Clair County | 258,046 | The County of St. |
| Champaign County | 209,192 | County in Illinois, United States |
| Aurora | 196,383 | The second most populous city in Illinois. |
| Sangamon County | 193,882 | County in Illinois, United States |
| Peoria County | 177,652 | County in Illinois, United States of America |
| McLean County | 171,256 | County in North Dakota, United States |
| Naperville | 147,986 | The second most populous city in Illinois. |