Alton is a city on the Mississippi River in Madison County, Illinois, United States, about 18 miles north of St. Louis, Missouri. The population was 25,676 at the 2020 census.

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Alton is located amid the confluence of three navigable rivers: the Illinois, the Mississippi, and the Missouri. Alton grew into a river trading town with an industrial character.

Explore the open street map of Alton, IL. The fullest detailed interactive street map. .

Web-based interactive mapping site that provides the ability to search and display several sources of transportation data. You can find information on winter road conditions, annual average …

Check online the map of Alton, IL with streets and roads, administrative divisions, tourist attractions, and satellite view.

Alton is a charming river town in Illinois just across the Mississippi River from St. Louis, Missouri. Once a blue collar town of heavy manufacturing, Alton has transformed itself into a tourist …