High Quality Content by WIKIPEDIA articles! Ocean City is a city in Cape May County, New Jersey, United States. It 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 population was 11,701. In summer months, with an influx of tourists and second homeowners, there are estimated to be 115,000 to 130,000 within the city`s borders.