Spring Lake Township is located in Tazewell County, Illinois.

As of the 2010 census, its population was 1,887 and it contained 887 housing units.

[2] According to the 2010 census, the township has a total area of 65.54 square miles (169.7 km2), of which 62.68 square miles (162.3 km2) (or 95.64%) is land and 2.86 square miles (7.4 km2) (or 4.36%) is water.

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