Lenzburg Township is located in St. Clair County, Illinois. As of the 2010 census, its population was 1,047 and it contained 450 housing units.[2]
Geography
According to the 2010 census, the township has a total area of 31.26 square miles (81.0 km2), of which 28.89 square miles (74.8 km2) (or 92.42%) is land and 2.37 square miles (6.1 km2) (or 7.58%) is water.[2]