Centralia Township is located in Marion County, Illinois. As of the 2010 census, its population was 15,042 and it contained 7,360 housing units.[2]
Geography
Centralia township (T1N R1E) is centered at 38°31'N 89°5'W (38.517, -89.087). The city of Centralia is located in the western part of the township. The township is traversed by U.S. Route 51 (north-south) and by State Route 161 (east-west). According to the 2010 census, the township has a total area of 36.1 square miles (93 km2), of which 35.02 square miles (90.7 km2) (or 97.01%) is land and 1.08 square miles (2.8 km2) (or 2.99%) is water.[2]