Salem Township is located in Marion County, Illinois.

As of the 2010 census, its population was 9,286 and it contained 4,225 housing units.

The city of Salem is located in the northeastern part of the township as is most of the Salem Reservoir (El.

According to the 2010 census, the township has a total area of 35.72 square miles (92.5 km2), of which 35.38 square miles (91.6 km2) (or 99.05%) is land and 0.34 square miles (0.88 km2) (or 0.95%) is water.

This Marion County, Illinois location article is a stub.