The cities with the highest median household income are mostly found along the coasts, with Arlington, VA leading the pack. This Census-designated place or CDP is
located on the opposite side of the Potomac from Washington, DC and is home to the Pentagon, Washington National Airport and a host of major
corporate headquarters including the future home of Amazon's HQ2. Arlington is not only the richest big city in the U.S. but is the most
educated on the list, with over 75% having attained at least a Bachelor's degree.