In 1900 Henry Flagler built the Mayport branch of the railroad and erected a station north of where the Adele Grage Cultural Center is currently located.

In 1913 the railroad sold most of the land to the Atlantic Beach Corporation which then began paving streets, installing lights, and water and sewer lines.

[5] However, during World War I people were afraid to come to the coast and the Atlantic Beach Corporation went bankrupt.

To make matters worse the Atlantic Beach Hotel burned down on September 20, 1919.

The Town of Atlantic Beach was incorporated in 1926 and the first charter was drafted by Isaac George and adopted in 1929.

The newly established Mayport Naval Station and the construction of the Mathews Bridge led to the further development of the town.

[6] As of the 2020 United States census, there were 13,513 people, 6,110 households, and 3,658 families residing in the city.

[12] As of the 2010 United States census, there were 12,655 people, 5,391 households, and 3,171 families residing in the city.