Ashland is a city in Boone County, Missouri, United States. Ashland is part of the Columbia, Missouri Metropolitan Statistical Area. The populatio…Ashland is a city in Boone County, Missouri, United States. Ashland is part of the Columbia, Missouri Metropolitan Statistical Area. The population was 4,747 at the 2020 census. Ashland was founded in 1853. It was named for the Ashland estate of Kentucky Congressman Henry Clay in Lexington, Kentucky. Clay was instrumental in the Missouri Compromise of 1820, which allowed Missouri's admission as the 24th state.
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