"1.69903e+09"^^ . "1.6"^^ . "2010Z"^^ . "Clay County (county code CY) is a county located in the U.S. state of Kansas. As of the 2010 census, the county population was 8,535. Its county seat and most populous city is Clay Center."@en . . "5.01933"^^ . "2.58999e+07"^^ . . . "8535"^^ . "1857-02-20Z"^^ . "Clay County"@en . . "1.67054e+09"^^ .