Madison County, Illinois
Madison County is a county in Illinois with an estimated population of 262,752 in 2023. 26 cities, towns and Census places in it are indexed here.
Largest places in Madison County
Granite City 26,908Edwardsville 26,698Alton 25,006Collinsville 23,779Godfrey 17,597Glen Carbon 13,868Troy 11,209Wood River 10,270Highland 9,961Bethalto 9,170Maryville 8,316Pontoon Beach 5,804East Alton 5,639Madison 3,065South Roxana 1,854Venice 1,457Roxana 1,413St. Jacob 1,369Hartford 1,157Worden 1,070Marine 941Hamel 918Livingston 745Alhambra 608Grantfork 339New Douglas 338
About Madison County
Madison County is one of the counties of Illinois. County governments in Illinois handle local services such as courts, property records and elections; cities and towns inside the county run their own municipal services. Population figures come from the Census Bureau's Vintage 2023 estimates, which are updated annually.