Ocean City is a city in Cape May County, New Jersey, United States. It is the county's largest city by area and is the principal city of the Ocean City Metropolitan Statistical Area which encompasses all of Cape May County. As of the 2010 United States Census, the city's population was 11,701, reflecting a decline of 3,677 (-23.9%) from the 15,378 counted in the 2000 Census, which had in turn declined by 134 (-0.9%) from the 15,512 counted in the 1990 Census.