Collinsville is a city located mainly in Madison County and partially in St. Clair County, Illinois, United States. As of the 2020 census, the city had a population of 24,366. Collinsville is approximately 14 miles east of St. Louis, Missouri, and is part of that city's Metro East area.
AdFind discounts on the best Collinsville Il. Tripadvisor helps you spend less. Save money & book with Tripadvisor, the world's largest travel website.
Save
Share
More