Cartwright Township is located in Sangamon County, Illinois. As of the 2010 census, its population was 1,482 and it contained 615 housing units. The township is named after pioneer missionary and Methodist minister Peter Cartwright, who lived in the township and is buried there. A United Methodist congregation within the limits of Pleasant Plains also bears his name. The most populated area of Cartwright Township is the town of Pleasant Plains, Illinois. Pleasant Plains has approximately 800 residents within its boundaries. The rest of the township is dotted with farmsteads and crop fields. Cartwright Township is known for its rich, fertile land and its agricultural roots. It is also the original home of Brandt Professional Agriculture now located in Springfield, IL.