Haysville is a city in Sedgwick County, Kansas, United States, and a suburb of Wichita. As of the 2020 census, the population of the city w…Haysville is a city in Sedgwick County, Kansas, United States, and a suburb of Wichita. As of the 2020 census, the population of the city was 11,262. Haysville is known as the "Peach Capital of Kansas".