Neptune Beach is a city in Duval County, Florida, United States. When the majority of communities in Duval County consolidated with Jacksonville, Florida in 1968, Neptune Beach, along with Jacksonville Beach, Atlantic 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 7,270 at the 2000 census. As of 2004, the population recorded by the U.S. Census Bureau is 7,120. Neptune Beach apartments for rent comparison page shows most up to date rent information on Neptune Beach apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.