Pekin Township is located in Tazewell County, Illinois.

As of the 2010 census, its population was 29,807 and it contained 13,321 housing units.

[3] According to the 2010 census, the township has a total area of 13.92 square miles (36.1 km2), of which 12.5 square miles (32 km2) (or 89.80%) is land and 1.42 square miles (3.7 km2) (or 10.20%) is water.

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