Corwin Township, Logan County, Illinois

Corwin Township is located in Logan County, Illinois. As of the 2010 census, its population was 643 and it contained 302 housing units. Corwin Township changed its name from Middletown Township on an unknown date.

Geography
According to the 2010 census, the township has a total area of 33.59 sqmi, of which 33.56 sqmi (or 99.91%) is land and 0.03 sqmi (or 0.09%) is water.