Fisher Island loses top spot as America’s priciest ZIP code. Here’s what to know

Miami’s ultra-exclusive Fisher Island has been dethroned as the nation’s most expensive ZIP code after a two-year reign. A California enclave fueled by artificial intelligence wealth has taken the No. 1 spot.

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FULL STORY: Exclusive slice of South Florida has lost the title of most expensive ZIP code

Read more ‘Implementing terror’: Miami business owners feeling pain of losing TPS workers

Here are key takeaways:

• Fisher Island’s 33109 ZIP code was overtaken by Atherton, California’s 94027, according to PropertyShark.com and Bloomberg. Atherton’s median home sale price climbed to nearly $10 million in the first half of 2026, a jump of roughly 20% from a year earlier.

• Atherton, located about 18 miles northwest of San Jose, has recorded five home sales of at least $30 million this year, Bloomberg reported. Employees of companies such as OpenAI, Anthropic and SpaceX are turning stock windfalls into luxury real estate purchases.

• Fisher Island remains one of the country’s wealthiest enclaves. The private 216-acre island is accessible only by ferry, yacht or helicopter, and last year Robb Report ranked it the nation’s most expensive ZIP code with a median home price of about $12 million.

• South Florida’s luxury market has been driven by hedge fund managers, private equity executives and billionaires including Ken Griffin, Jeff Bezos and Carl Icahn, whose moves to Miami-Dade helped push home prices to record highs.

• South Florida still dominates the ultra-luxury tier. According to Bloomberg, 7 of the nation’s 11 residential sales topping $100 million last year occurred in Florida.

This report was produced with the assistance of a proprietary tool powered by artificial intelligence and using our own originally reported, written and published content. It was reviewed and edited by our journalists.

Read more Fisher Island loses top spot as America’s priciest ZIP code. Here’s what to know