what county is jacksonville, fl
Black Hammock Island and the city of Jacksonville are located in Duval County, Florida. The population of the county is 864,263; Jacksonville is the county seat. Duval County is named after William Pope DuVal, former Governor of the Florida Territory. Duval County is bordered by Nassau County to the north, St. Johns County to the southeast, Clay County to the southwest and Baker County to the west. Cities and towns within the county include Atlantic Beach, Baldwin, Jacksonville, Jacksonville Beach and Neptune Beach. Timucuan Ecological and Historic Preserve is one of its two national protected areas; For Caroline National Memorial, the first French colony in the US, is the other.