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1.
America's most expensive zip code, hands down.

the 10128 covers the gold coast aka Manhattan's upper east side, encompassing Fifth Avenue as well as Park. Families living in the 10128 put the amount of wealth displayed on shows like the OC to shame. 10128 residents have more money, own more homes, more cars, and have more domestically staffed employees than any other zip code in america.

Worth magazine validates this in a 2002 cover story on America's wealthiest towns.
10128: America's most expensive zip code.
by nyc girl May 11, 2005