Collinsville, IL Demographics
Collinsville, IL is the 95th most populous of 1464 cities in Illinois, with 24,366 residents across 15 square miles. That is about 1,616 people per square mile.
At the 2020 census
| Population | 24,366 |
|---|---|
| Land area | 15 sq mi |
| Density | 1,616 / sq mi |
Data: 2020 Decennial Census · land area from Census TIGER/Line
How Collinsville, IL compares to the US
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About this page
City statistics cover the municipal boundary only, not the wider metro area.
Figures come from the 2020 census and the American Community Survey, compared against national averages.