In this edition, we talk Clay County. Did you know Clay County has 606 square miles of land and 39 square miles of water for a total area of 644 square miles? The county also has 241,908 residents, and of those, 112,500 are employed. Clay’s population grew 1.63% last year. While it's an unincorporated area, Lakeside is considered to have the greatest population. There are 247 miles of dirt roads in the county, and nearly 740 miles of paved roads. And the county has a median house income of $86,000. There are three municipalities in the county. Orange Park is officially 5.32-square-miles, which includes 1.7-square miles of waterways. Keystone Heights is only 1.1 square miles, with .01-square-miles of water. And, Green Cove Springs has a land area of 7.5-square miles and a water area of 2.7-square miles.