Jacksonville Beach, Florida —  City  — Images from top, left to right: Jacksonville Beach Pier, Casa Marina Hotel, Freebird Live, condos, statue in front of the City Hall, Lynch's Irish Pub, Sea Walk Pavilion, Jacksonville Beach City Hall Location in Duval County and the state of Florida Coordinates: 30°17′3″N 81°23′46″W / 30.28417°N 81.39611°W / 30.28417; -81.39611Coordinates: 30°17′3″N 81°23′46″W / 30.28417°N 81.39611°W / 30.28417; -81.39611 Country  United States State  Florida County  Duval Government  • Mayor Fland Sharp Area  • City 22 sq mi (56.9 km2)  • Land 7.7 sq mi (19.9 km2)  • Water 14.3 sq mi (37 km2) Elevation 10 ft (3 m) Population (2010)  • City 21,362  • Density 2,774.3/sq mi (7,185.4/km2)  • Metro 1,345,596 Time zone Eastern (EST) (UTC-5)  • Summer (DST) EDT (UTC-4) ZIP codes 32227, 32240, 32250 Area code(s) 904 FIPS code 12-35050 GNIS feature ID 0284697 Jacksonville Beach is a city on the Atlantic coast of Duval County, east of Jacksonville, Florida, US. It is part of the Jacksonville Beaches community, together with Mayport, Atlantic Beach, Neptune Beach, and Ponte Vedra Beach. When the city of Jacksonville consolidated with Duval County in 1968, Jacksonville Beach, together with Atlantic Beach, Neptune Beach, and Baldwin, voted to retain their own municipal governments. The population was 21,362 at the 2010 census.