Bison is a city in Rush County, Kansas, United States. As of the 2020 census, the population of the city was 179. The community was platt…Bison is a city in Rush County, Kansas, United States. As of the 2020 census, the population of the city was 179. The community was platted in 1888 by the Missouri Pacific Railroad. It was named for the American bison, which once grazed there.