Turnersville is an unincorporated community and census-designated place (CDP) located within Washington Township, in Gloucester County, in the U.S. state of New Jersey.

New Jersey Route 42 forms its eastern boundary and interchanges with the western terminus of the Atlantic City Expressway there.

The CDP has a humid subtropical climate (Cfa) and average monthly temperatures range from 33.2 °F (0.7 °C) in January to 77.1 °F (25.1 °C) in July.

The 2010 United States census counted 3,742 people, 1,217 households, and 1,069 families in the CDP.

Of all households, 10.4% were made up of individuals and 4.1% had someone living alone who was 65 years of age or older.

[10] As of the 2000 United States census,[6] there were 3,867 people, 1,167 households, and 1,060 families living in the CDP.

7.0% of all households were made up of individuals, and 3.6% had someone living alone who was 65 years of age or older.