Overbrook is a city in Osage County, Kansas, United States. As of the 2020 census, the population of the city was 1,005. The Santa Fe Trai…Overbrook is a city in Osage County, Kansas, United States. As of the 2020 census, the population of the city was 1,005. The Santa Fe Trail passed through the Overbrook area, and ruts can still be seen at certain locations in and around the city.
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