Aerial panorama of Mercer Island to Bellevue and Lake Washington. This area is home to several of the most expensive ZIP codes in Washington. Recent analyses determined the richest cities in states of ...

One Washington ZIP code made the 2021 list of the most expensive ZIP codes in the country. The ZIP code — 98039 — located in Medina, took the No. 10 spot on the list of the priciest ZIP codes in the U ...