Ventnor City is a city in Atlantic County, New Jersey, United States. As of the 2010 United States Census, the city's population was 10,650, reflecting a decrease of 2,260 from the 12,910 counted in the 2000 Census, which had in turn increased by 1,905 from the 11,005 counted in the 1990 Census.Ventnor City was incorporated as a city by an act of the New Jersey Legislature on March 17, 1903, from portions of Egg Harbor Township.