East Farmingdale is a hamlet and a census-designated place (CDP) located in the Town of Babylon in Suffolk County, on the South Shore of Long Island, in New York, United States.

[2] In the past, some or all East Farmingdale was proposed to become part of the never-realized Incorporated Village of Half Hollow Hills.

Around 2001, East Farmingdale and its neighbors Dix Hills, Melville, and Wheatley Heights (all partially or wholly within the Half Hollow Hills Central School District) proposed incorporating as a single village called the Incorporated Village of Half Hollow Hills.

[2][5] East Farmingdale is bordered to the west by South Farmingdale, the village of Farmingdale, to the north Melville, and to the northwest by Old Bethpage, to the east by Wyandanch and West Babylon, to the southeast by North Lindenhurst, and to the south by North Amityville.

24.7% of all households were made up of individuals, and 13.1% were someone living alone who was 65 years of age or older.

20.8% of the population were foreign-born, and 27.5% of residents at least 5 years old spoke a language other than English at home.

[10] The portion of East Farmingdale north of Conklin Street is all within the Half Hollow Hills Central School District.

[4] New York State Route 110 (Broad Hollow Road) is one of the largest business corridors on Long Island, and many Long Island companies are based in East Farmingdale.