Clay County Florida
Clay County is a county located in the U.S. state of Florida. As of 2000, the population was 140,814. The U.S. Census Bureau 2005 estimate for the county is 171,095. Its county seat is Green Cove Springs, Florida. Clay County is part of the Greater Jacksonville Metropolitan area.

History
Clay County was created in December 1858 from a section of Duval County. Its name is in honor of Henry Clay, famous American statesman, member of the United States Senate from Kentucky and United States Secretary of State in the 19th century.