Atherton reclaims title as most expensive U.S. ZIP code

Atherton, California, has reclaimed its position as the most expensive ZIP code in the United States. According to PropertyShark’s annual ranking, the town’s 94027 ZIP code became the first in the country to reach a median home sale price of over $10 million, rising 29% from $8.3 million in 2025 to $10.73 million in 2026.

Atherton has held the top ranking nine times in the last 11 years. Its median price significantly exceeded the second-ranked location, Sagaponack, New York, which recorded a median sale price of $7.35 million. Fisher Island, Florida, which held the top spot last year, fell to third place with a median sale price of $7.22 million.

California maintains a strong presence in the top 10, with six ZIP codes represented, including locations in the Midpeninsula such as Los Altos-Los Altos Hills and Palo Alto. Other high-ranking areas include Newport Beach, California, and several locations in New York.