Freeburg Township is located in St. Clair County, Illinois.

As of the 2010 census, its population was 5,109 and it contained 2,118 housing units.

[2] According to the 2010 census, the township has a total area of 35.66 square miles (92.4 km2), of which 34.32 square miles (88.9 km2) (or 96.24%) is land and 1.34 square miles (3.5 km2) (or 3.76%) is water.

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