High Quality Content by WIKIPEDIA articles! Walnut Township is a township in Crawford County, Kansas, USA. As of the 2000 census, its population was 624.Walnut Township covers an area of 64.18 square miles (166.2 km2) and contains two incorporated settlements: Hepler and Walnut. According to the USGS, it contains three cemeteries: Glenwood, Lutheran and Walnut.The stream of Pony Creek runs through this township.