Corwin Township is located in Logan County, Illinois.

As of the 2010 census, its population was 643 and it contained 302 housing units.

[2] Corwin Township changed its name from Middletown Township on an unknown date.

According to the 2010 census, the township has a total area of 33.59 square miles (87.0 km2), of which 33.56 square miles (86.9 km2) (or 99.91%) is land and 0.03 square miles (0.078 km2) (or 0.09%) is water.

This Logan County, Illinois location article is a stub.