BELLEVUE, Wash. — Washington state's 10 most expensive ZIP codes all are congregated in the same county, a new report finds. King County is home to each of the most expensive areas in the state ...

ZIP code 20037, covering parts of Foggy Bottom and the West End in D.C., is home to George Washington University and is the most expensive rental ZIP code in the area. Rent averages $2,864 a month ...