Sun City is a city in Barber County, Kansas, United States, along the Medicine Lodge River. As of the 2020 census, the population of the c…Sun City is a city in Barber County, Kansas, United States, along the Medicine Lodge River. As of the 2020 census, the population of the city was 37. Sun City was founded in 1872. The first post office in Sun City was established in August 1873.
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