"Fisher Island — home to coveted golf courses, waterfront mansions and about 700 households — had a median home sales price of $9.5 million...compared to Atherton’s $8.3 million." (Article link below.)

https://www.mansionglobal.com/articles/south-florida-dethrones-silicon-valley-as-home-to-americas-most-expensive-zip-code-2ca1be45