Deer Park Township is located in LaSalle County, Illinois.

As of the 2010 census, its population was 492 and it contained 217 housing units.

[2] According to the 2010 census, the township has a total area of 33.03 square miles (85.5 km2), of which 31.33 square miles (81.1 km2) (or 94.85%) is land and 1.7 square miles (4.4 km2) (or 5.15%) is water.

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