Dennisville is an unincorporated community and census-designated place (CDP) located within Dennis Township, in Cape May County, in the U.S. state of New Jersey. It is part of the Ocean City Metropolitan Statistical Area. Its postal ZIP Code is 08214.

Route 47 is a state highway in the southern part of New Jersey. It runs 75.20 mi (121.02 km) from Atlantic Avenue in Wildwood, Cape May County, north to U.S. Route 130 in Brooklawn, Camden County. It is also referred to as Delsea Drive, as it connects the Delaware River near Brooklawn to the Atlantic Ocean in Wildwood. This name was assigned by the New Jersey Legislature in 1933. The route runs through rural areas of Cape May and southern Cumberland counties as a two-lane road. Traffic jams along this portion of Route 47 are commonplace in the summer vacation season and can stretch for miles due to the missing southern section of Route 55, where all Jersey Shore-bound traffic enters the small two-lane road. North of here, the route runs through the cities of Millville and Vineland before entering Gloucester County, where it passes through more rural areas as well as Clayton and Glassboro. Past Glassboro, it heads through suburban areas in Washington and Deptford townships before running through Westville and Brooklawn. Route 47 is the longest signed state route in New Jersey.