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ropertyShark’s 10th‑annual ranking of the United States’ 100 most expensive ZIP codes spotlights Massachusetts with five entries: Boston (54), Nantucket (63), Chilmark (64), Weston (72), and Wellesley Hills (80). Coastal markets dominate the list, with California leading at 61% of the spots. Fifteen states are represented, including New England’s Connecticut and New Hampshire. Greenwich, CT (06878) tops the New England cluster at 43.
Boston’s 02199 averages $2.57 million—about half its 2021 peak—and has appeared on the list seven times in the last decade. Nantucket’s 02554 sits at $2.5 million, down 14% year over year. Two Massachusetts ZIPs set new records: Chilmark’s 02535 at $2.48 million and Weston’s 02493 at $2.39 million; Wellesley Hills 02381 trails by $50,000 at $2.25 million.
Connecticut boasts seven of the country’s priciest ZIPs, the third‑largest total after New York and California, surpassing Massachusetts for the first time. New Hampshire’s top ZIP, New Castle 03854, commands a median sale of $2.65 million—higher than Boston’s 02199—marking the first instance where an NH ZIP outpaces a MA ZIP.
The overall leader remains Miami Beach’s Fisher Island (33109) with a $9.5 million median, Florida’s first appearance at the summit.
Data were drawn from residential transactions—condos, co‑ops, single‑ and two‑family homes—closed between January 1 and September 30, 2025. The article was written by Kristi Palma, a culture writer for Boston.com who specializes in New England travel.
