Four Mile Township is located in Wayne County, Illinois.
As of the 2010 census, its population was 666 and it contained 272 housing units.
[2] According to the 2010 census, the township has a total area of 40.06 square miles (103.8 km2), of which 40.04 square miles (103.7 km2) (or 99.95%) is land and 0.02 square miles (0.052 km2) (or 0.05%) is water.
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