File:Madison_County_Courthouse,_Edwardsville.jpg · Wikimedia Commons · See Wikimedia Commons
Madison County
Sign in to saveAlso known as Madison County, Illinois, Madison County, IL
county in Illinois, United States
Key facts
- Country
- United States
- State
- Illinois
- Founded
- September 14, 1812
- Named after
- James Madison
- Seat
- Edwardsville
- Largest city
- Granite City
- Total
- 741 sq mi (1,920 km )
- Land
- 716 sq mi (1,850 km )
- Water
- 25 sq mi (65 km ) 3.4%
- Estimate 2025
- 263,110
- Density
- 371/sq mi (143/km )
- Time zone
- UTC−6 ( Central )
- Summer dst
- UTC−5 ( CDT )
- Congressional districts
- 13th , 15th
- Website
- www .madisoncountyil .gov
via Wikipedia infobox
Wikidata facts
- Population
- 265859
- Area
- 1918
- Official website
- www.co.madison.il.us
- Image
- Madison County Courthouse, Edwardsville.jpg
- Households
- 108429
Show 5 more facts
- Commons category
- Madison County, Illinois
- inception
- 1812-09-14
- water as percent of area
- 3.4
- native label
- Madison County
- per capita income
- 33599
Sources (11)
via Wikidata · CC0
~10 min read
Article
Madison County is located in the U.S. state of Illinois. It is a part of the Metro East in southern Illinois. According to the 2020 census, it had a population of 264,776, making it the eighth-most populous county in Illinois and the most populous in the southern portion of the state. The county seat is Edwardsville, and the largest city is Granite City.
Madison County is part of the Metro East region of Greater St. Louis. The pre-Columbian city of Cahokia Mounds, a World Heritage Site, was located near Collinsville. Edwardsville is home to Southern Illinois University Edwardsville. To the north, Alton is known for its abolitionist and American Civil War-era history. It is also the home of the Southern Illinois University School of Dental Medicine. Godfrey, the village named for Captain Benjamin Godfrey, offers Lewis and Clark Community College formerly the Monticello Female Seminary.