Atlantic Beach, Florida —  City  — The beach, One Ocean Resort Hotel, Hanna Park Location in Duval County and the state of Florida Coordinates: 30°20′5″N 81°24′32″W / 30.33472°N 81.40889°W / 30.33472; -81.40889Coordinates: 30°20′5″N 81°24′32″W / 30.33472°N 81.40889°W / 30.33472; -81.40889 Country  United States State  Florida County  Duval Government  • Mayor John Meserve Area  • Total 13 sq mi (33.7 km2)  • Land 3.7 sq mi (9.7 km2)  • Water 9.3 sq mi (24 km2) Elevation 10 ft (3 m) Population (2000)  • Total 13,368  • Density 1,028.3/sq mi (396.7/km2) Time zone Eastern (EST) (UTC-5)  • Summer (DST) EDT (UTC-4) ZIP codes 32224, 32233 Area code(s) 904 FIPS code 12-02400 GNIS feature ID 0277982 Atlantic Beach is a city in Duval County, Florida, US, part of the Jacksonville Beaches communities. When the majority of communities in Duval County consolidated with Jacksonville, Florida in 1968, Atlantic Beach, along with Jacksonville Beach, Neptune Beach, and Baldwin, Florida, remained quasi-independent. Like the other towns, it maintains its own municipal government but its residents vote in the Jacksonville mayoral election and have representation on the Jacksonville city council. The population was 13,368 at the 2000 census. According to the U.S Census estimates of 2005, the city had a population of 13,436. Development of Atlantic Beach took off around 1900 after Henry Flagler built the Mayport stop of his East Coast Railway to the north of the town. The Atlantic Beach Corporation bought and developed most of the land in what is now Atlantic Beach in 1915, and the town was incorporated in 1926. The town was expanded in the 1987 when it annexed Seminole Beach, which had previously been within the city limits of Jacksonville. The current mayor is Mike Borno.