Omega Township is located in Marion County, Illinois.

As of the 2010 census, its population was 501 and it contained 212 housing units.

156 m) and Stephen A. Forbes State Park are located mainly at the north end of the township.

According to the 2010 census, the township has a total area of 36.33 square miles (94.1 km2), of which 35.49 square miles (91.9 km2) (or 97.69%) is land and 0.84 square miles (2.2 km2) (or 2.31%) is water.

This Marion County, Illinois location article is a stub.