Decker Township is located in Richland County, Illinois.

As of the 2010 census, its population was 406 and it contained 170 housing units.

[2] Decker Township bears the name of Thomas J. Decker, a local pioneer.

[4]: Township Names According to the 2010 census, the township has a total area of 35.26 square miles (91.3 km2), of which 35.23 square miles (91.2 km2) (or 99.91%) is land and 0.03 square miles (0.078 km2) (or 0.09%) is water.

This Richland County, Illinois location article is a stub.