Collinsville Township, Madison County, Illinois
| Collinsville Township | |
| Township | |
| Country | United States |
|---|---|
| State | Illinois |
| County | Madison |
| Elevation | 499 ft (152.1 m) |
| Coordinates | 38°42′01″N 89°58′54″W / 38.70028°N 89.98167°WCoordinates: 38°42′01″N 89°58′54″W / 38.70028°N 89.98167°W |
| Area | 35.73 sq mi (92.5 km2) |
| - land | 34.86 sq mi (90 km2) |
| - water | 0.87 sq mi (2 km2) |
| Population | 36,265 (2010) |
| Density | 1,040.3/sq mi (401.7/km2) |
| Settled | November 2, 1875 |
| Timezone | CST (UTC-6) |
| - summer (DST) | CDT (UTC-5) |
 Location in Madison County
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  Location of Collinsville Township in Illinois
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 Location of Illinois in the United States
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Collinsville Township is located in Madison County, Illinois, in the United States. As of the 2010 census, its population was 36,265 and it contained 16,407 housing units.
Collinsville Township takes its name from the city of Collinsville.
According to the 2010 census, the township has a total area of 35.73 square miles (92.5 km2), of which 34.86 square miles (90.3 km2) (or 97.57%) is land and 0.87 square miles (2.3 km2) (or 2.43%) is water.
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