Five zip codes in Massachusetts are among the 100 most expensive places in the nation to purchase a home, according to a study from the real estate data and research company PropertyShark.

On average, the five areas — in Boston’s Back Bay, Nantucket, Martha’s Vineyard and the Boston suburbs of Weston and Wellesley — saw their median home sales reach more than $2.4 million this year.

Miami Beach’s Fisher Island topped the list of the United States’ priciest zip codes, with home sales ranging from a minimum $1.41 million up to $23.7 million this year. Its median sale of $9.5 million led a zip code in San Mateo County, California, where the median sale reached $8.3 million, and a Long Island, New York, zip code that hit $5.9 million.

Boston’s 02199 zip code, which surrounds the Prudential

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