This map highlights in yellow the nation's Super Zips — those ranking highest on income and college education. The largest collection of Super Zips is around Washington, D.C. A Zip’s ranking is a ...

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 ...