Bellevue is a city in Blaine County in the central part of the U.S. state of Idaho. The population was 1,876 at the 2000 census. It is located in the Wood River Valley, about 18 miles (29 km) south of the resort area of Ketchum and Sun Valley. The town of Hailey and the airport are a few miles north of Bellevue. The elevation of Bellevue is 5170 feet (1575 m) above sea level. The Big Wood River flows near downtown.