Ball Township is located in Sangamon County, Illinois. As of the 2010 census, its population was 6,701 and it contained 2,403 housing units. The township's offices are located in Glenarm. Portions of the village of Chatham are located in this township. Portions of Lake Springfield are also located in the township, including the former site of the flooded town of Cotton Hill.

Geography

According to the 2010 census, the township has a total area of 29.94 square miles (77.5 km), of which 29.87 square miles (77.4 km) (or 99.77%) is land and 0.07 square miles (0.18 km) (or 0.23%) is water.

Historical population

Census	Pop.	Note	%±
2016 (est.)	7,062
U.S. Decennial Census