Bellevue, Washington. For other places with the same name, see Bellevue (disambiguation). Not to be confused with Bellevue (Washington, D.C.). Bellevue (/ˈbɛlvjuː/ BEL-vew) is a city in the Eastside region of King County, Washington, United States, across Lake Washington from Seattle. As the third-largest city in the Seattle metropolitan area, Bellevue has variously been characterized as an edge city, a boomburb, or satellite city.