The City of Atlantic Beach is a small seaside community and a great place to call home. It is located in northeast Florida in Duval County and is surrounded by natural beauty; a pristine beach to our east, the maritime woods of Hanna Park to the north and the beautiful Intracoastal Waterway marshes to our west. The population is 12,655, while the median income for a household is $48,353 and $53,854 for a family.