Potwin is a city in Butler County, Kansas, United States. It is named after the town site land owner Charles Potwin. As of the 2010 census, the city population was 449.
Potwin was incorporated as a town on April 8, 1885. This land, owned by Charles Potwin, whereby the town received it’s name, became a station for the Missouri Pacific Railroad, instigated by William I. Joseph, known as the Father of Potwin.
Mr. Joseph came from West Virginia and as more settlers arrived he became interested in a railroad to serve the area. After much diligent pursuit, the station was built and Mr. Joseph, a land agent for Charles Potwin, began development of a town site around the Potwin station. He opened a land office where the Potwin grocery now stands.