Clay County is a county located in the U.S. state of South Dakota, the county is named in honor of Henry Clay, an American lawyer and planter, statesman, and skilled orator who represented which state,in both the United States Senate and House of Representatives?
Clay County, South Dakota Clay County is a county located in the U.S. state of South Dakota. As of the 2010 census, the population was 13,864. The county seat is Vermillion, which is also home to the University of South Dakota. The county is named in honor of Henry Clay, American statesman, member of the United States Senate from Kentucky and United States Secretary of State in the 19th century.
Clay County, Illinois Clay County is a county located in the U.S. state of Illinois. As of the 2010 census, the population was 13,815. Its county seat is Louisville.