Stone Harbor is a borough in Cape May County, New Jersey, United States, that is part of the Ocean City Metropolitan Statistical Area. It occupies the southern portion of Seven Mile Island together with its northern neighbor Avalon. It is a resort community that attracts visitors looking to enjoy its beaches, sailing facilities and commercial center. The community attracts a large number of vacationers from the Mid-Atlantic region and Quebec. The borough has a summer population in excess of 20,000, though as of the 2010 United States Census, the borough had a year-round population of 866, reflecting a decline of 262 (-23.2%) from the 1,128 counted in the 2000 Census, which had in turn increased by 103 (+10.0%) from the 1,025 counted in the 1990 Census. In general, summer visitors are wealthier than full-time residents.The New York Times describes Stone Harbor as a place of "gleaming McMansions and elegant shops", with an average single-family home selling for $2.5 million in 2008. In 2017, Stone Harbor was the third-most expensive Zip Code in the State of New Jersey based on median home sale price, and had the second-priciest residential real estate transaction in the state that year at $10 million. In 2014, Forbes magazine ranked Stone Harbor (ZIP Code 08247) as #191 on its list of the most expensive ZIP Codes in the United States.