Jackson Township is a township in Clarke County, Iowa, USA. As of the 2000 census, its population was 577.
Jackson Township covers an area of 36.83 square miles (95.4 km2) and contains one incorporated settlement, Woodburn. According to the USGS, it contains four cemeteries: Lewis, Ottawa, Saint Marys and Woodburn.
The stream of Brush Creek runs through this township.