Marion Township is a township in Bourbon County, Kansas, United States. As of the 2000 census, its population was 1,165.
Marion Township covers an area of and contains two incorporated settlements: Bronson and Uniontown. According to the USGS, it contains five cemeteries: Hatch, Marion, Mount Zion, Turkey Creek and Walnut Hill.
The streams of Dyer Creek, Hinton Creek, Turkey Creek, Walnut Creek, West Fork Dry Wood Creek and Wolfpen Creek run through this township.