Jacksonville Beach is a city on the Atlantic coast of Duval County, east of Jacksonville, Florida, United States. It is part of the Jacksonville Beaches communities, 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.
Jacksonville Beach is located at 30°17′3″N 81°23′46″W (30.284091, -81.396074).
According to the United States Census Bureau, the city has a total area of 22.0 square miles (56.9 km2). 7.3 square miles (19.0 km2) of it is land and 14.6 square miles (37.9 km2) of it (66.61%) is water.
Jacksonville Beach is the largest town in the Jacksonville Beaches community. It is the eastern terminus of U.S. Route 90, which ends at an intersection with State Road A1A three blocks from the Atlantic Ocean.
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