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For the second consecutive year, Silicon Valley suburb Atherton took the No. 1 spot.
The median sale price in Atherton, California, was $6.7 million in 2018 - up 35% from last year.
There's a lot of expensive real estate in California.
Property Shark released its annual ranking of the most expensive zip codes in America on Monday, and California dominates with 82% of the cities on the list.
Zip codes in New York, Washington, Florida, and Massachusetts also appeared on the list.
Property Shark's ranking is based on median sales prices. Atherton, California's 94027 remains the No. 1 most expensive zip code, with a $6.7 million median home sale price - that's up 35% from last year.
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Located within striking distance of Google, Facebook, Tesla, and other tech giants' headquarters, Atherton is home to many of Silicon Valley's 1%.
Below, take a closer look at the top 25 most expensive zip codes in America.
