Kirksville is the county seat of and most populous city in Adair County, Missouri, United States. Located in Benton Township, its population …Kirksville is the county seat of and most populous city in Adair County, Missouri, United States. Located in Benton Township, its population was 17,530 at the 2020 census. Kirksville is home to three colleges: Truman State University, Moberly Area Community College, and A.T. Still University.
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