The ZIP code of Atherton, Calif., may be the most expensive in the U.S. (the median price of the 24 homes listed for sale last summer was $9.03 million), but the state of New York takes seven spots of the top 10 most expensive ZIP codes.
At number 2 is Sagaponack, N.Y., where the median price of homes is $6,433,076.92 with 327 day on the market on average. The rest of the six ZIP codes in the top 10 that belong in New York state are in New York City.