Madison County, Illinois
Madison County: county in Montana, United States.
About
Madison County is a county located in the U.S. state of Illinois. As of the 2010 census, the population was 269,282 and a population density of 29 people per km². After 10 years in 2020 county had an estimated population of 262,635 inhabitants. Its county seat is Virginia City. The county was created 161 years ago in 1864.
County Snapshot
Madison County at a glance
Madison County currently has 17 quality-checked populated place pages linked on MapSof, making it easier to jump from the county overview into local city pages.
Mapped populated places
17
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
AltonPopulation 26,049
Top linked places
Quick Facts about Madison County
| Population | 262,635 (2020) |
| Country | United States of America |
| State | Illinois (United States) |
| Different from | Madison County, Madison County, Madison County, Madison County, Madison County, Madison County, Madison County, Madison County, Madison County, Madison Parish, Madison County, Madison County, Madison County, Madison County, Madison County, Madison County, Madison County, Madison County, Madison County |
| Area | 9331 km2 |
| Water as percent of area | 0.4% |
| Land as percent of area | 99.6% |
| Latitude & Longitude | 38.8299,-89.9052 |
| Named for | James Madison |
| Altitude | 541 feet / 165 meters |
| Capital | Virginia City |
| Establishment | January 01, 1865 |
| Time Zone | America/Chicago |
| Local time | 05:30:38 (23rd September 2026) |
| Density | 28 Pop. per km² as of 2020 |
| Population growth | -2.47% (2010-2020) |
| Weather | 72℉ Mostly Cloudy 7-days weather |
Geography
Madison County is located at 38°49'47"N 89°54'19"W (38.8298500, -89.9051700). It has 5 neighbors: Fremont County, Beaverhead County, Gallatin County, Jefferson County and Silver Bow County.
Madison County map
icon to open full mode. View satellite images
The largest city of Madison County is Alton with a population of 26,049. Other cities include, Edwardsville population 25,189, Collinsville population 24,217, Godfrey population 17,393 and Glen Carbon population 12,887. See all Madison County cities & populated places.
Madison County Populated Places (more)
Cities, towns, neighborhoods & other populated places in Madison County.
| City Name | Population | Title |
|---|---|---|
| Alton | 26,049 | City in Madison County, Illinois, United States |
| Granite City | 25,662 | Township in Madison County, Illinois |
| Edwardsville | 25,189 | City in Madison County, Illinois, United States |
| Collinsville | 24,217 | City in Illinois |
| Godfrey | 17,393 | Village in Madison County, Illinois, United States |
| Glen Carbon | 12,887 | Village in Illinois, United States |
| Nameoki | 12,056 | Township in Madison County, Illinois |
| Troy | 10,399 | City in Madison County, Illinois, United States |
| Highland | 10,017 | City in Madison County, Illinois, United States |
| Wood River | 10,002 | City in Illinois, United States |
| Bethalto | 9,201 | Village in Illinois |
| Maryville | 7,959 | City in Illinois, United States of America |
| East Alton | 5,922 | City in Illinois, United States of America |
| Pontoon Beach | 5,655 | Town |
| Madison | 3,735 | City in Madison County, Florida, United States |
| South Roxana | 1,986 | City in Illinois, United States of America |
Weather
Mostly cloudy, with a high near 72. North wind 6 to 10 mph.
7-Day ForecastOfficial website of Madison County
Official Website- Virginia City
Demographics
According to census records, the population of Madison County decreased by 2.47% in 10 years.
| Year | Population | % Change | Method |
|---|---|---|---|
| 2010 | 269,282 | - | census |
| 2011 | 268,636 | -0.24% | estimation process |
| 2012 | 268,072 | -0.21% | estimation process |
| 2013 | 267,268 | -0.3% | estimation process |
| 2014 | 266,566 | -0.26% | estimation process |
| 2015 | 265,996 | -0.21% | estimation process |
| 2016 | 265,641 | -0.13% | estimation process |
| 2017 | 265,251 | -0.15% | estimation process |
| 2018 | 264,026 | -0.46% | estimation process |
| 2019 | 262,966 | -0.4% | estimation process |
| 2020 | 262,635 | -0.13% | estimation process |
Other places with the same name (18)
- Madison County, Alabama county in Alabama, United States. with a population of 379,453 people.
- Madison County, Indiana county in Indiana, United States. with a population of 129,681 people.
- Madison County, Mississippi county in Mississippi, United States. with a population of 106,871 people.
- Madison County, Tennessee county in Tennessee, United States. with a population of 98,360 people.
- Madison County, Kentucky county in Kentucky, United States. with a population of 94,265 people.
- Madison County, New York county in New York, United States. with a population of 70,478 people.
- Madison County, Ohio county in Ohio, United States. with a population of 44,559 people.
- Madison County, Idaho county in Idaho, United States. with a population of 39,907 people.
- Madison County, Nebraska county in Nebraska, United States. with a population of 34,813 people.
- Madison County, Georgia county in Georgia, United States. with a population of 30,457 people.
- Madison County, North Carolina county in North Carolina, United States. with a population of 21,740 people.
- Madison County, Florida county in Florida, United States of America. with a population of 18,707 people.
- Madison County, Arkansas county in Arkansas, United States. with a population of 16,644 people.
- Madison County, Iowa county in Iowa, United States. with a population of 16,521 people.
- Madison County, Texas county in Texas, United States. with a population of 14,427 people.
- Madison County, Virginia county in Virginia, United States. with a population of 13,312 people.
- Madison County, Missouri county in Missouri, United States. with a population of 12,113 people.
- Madison County, Montana county in Montana, United States. with a population of 8,959 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 |
| 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. |
| Rockford | 144,835 | The second most populous city in Illinois. |