Marion Township is located in Ogle County, Illinois.

As of the 2010 census, its population was 4,135 and it contained 1,531 housing units.

[2] This population dropped in 2022 when a population of 3,898 people was recorded.

[3] According to the 2010 census, the township has a total area of 45.42 square miles (117.6 km2), of which 44.84 square miles (116.1 km2) (or 98.72%) is land and 0.57 square miles (1.5 km2) (or 1.25%) is water.

This Ogle County, Illinois location article is a stub.