High Quality Content by WIKIPEDIA articles! Walnut Township is a township in Bourbon County, Kansas, USA. As of the 2000 census, its population was 135.Walnut Township covers an area of 59.49 square miles (154.1 km2) and contains no incorporated settlements. According to the USGS, it contains one cemetery, Rosedale.The streams of Owl Creek and Prong Creek run through this township.Bourbon County (county code BB) is a county located in Southeast Kansas, in the Central United States. The population was 15,379 at the 2000 census, and it was estimated to be 14,950 in the year 2006. Its county seat and most populous city is Fort Scott.