Bellevue is a city in the Eastside region of King County, Washington, United States, located across Lake Washington from Seattle. It is the third-largest city in the Seattle metropolitan area, and the fifth-largest city in Washington. It has variously been characterized as a satellite city, a suburb, a boomburb, or an edge city. The population was 151,854 at the 2020 census. The city's name is derived from the French term belle vue.

The Eastside of the King County, Washington area in the United States is a collective term for the suburbs of Seattle located on the east side of Lake Washington.