The average household income for each, respectively, is $193,292, $183,484 and $171,153.
The ZIP codes in the top 10, meanwhile, include parts of Vienna, Cabin John, McLean and Potomac, among others. The No. 1 wealthiest ZIP code, according to the list, was the Great Falls ZIP code of 22066, with an average household income of $225,311.
The “wealthiest ZIP code” rankings are determined by factors like home values, net worth and disposable income.