Property Shark listed the Most Expensive U.S. Zip Codes and Boston (Back Bay) was number 2! See where your zip code ranks. # Zip Code Location County State Median Sale Price 2021 1 94027 Atherton San Mateo County CA $7,475,000 2 02199 Boston Suffolk County MA $5,500,000 3 11962 Sagaponack Suffolk County NY $5,000,000 4 […]