Wheaton is a city in Pottawatomie County, Kansas, United States. As of the 2020 census, the population of the city was 98. The first post offic…Wheaton is a city in Pottawatomie County, Kansas, United States. As of the 2020 census, the population of the city was 98. The first post office in Wheaton was established in 1870, but it was called Leghorn until 1883. The post office remained in operation until it was discontinued in 1992.
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