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Clay County is a county in the U.S. state of South Dakota. As of the 2020 United States Census, the population was 14,967. The county seat is Vermillion, which is also home to the University of South Dakota. The county is named for Henry Clay, American statesman, US Senator from Kentucky, and United States Secretary of State in the 19th century. Clay County comprises the Vermillion, SD Micropolitan Statistical Area, which is also included in the Sioux City-Vermillion, IA-SD-NE Combined Statistical Area.
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[edit] CemeteriesCemeteries of Clay County, South Dakota, United States [edit] Research Tips[edit] External links
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