Hailey is a city in and the county seat of Blaine County, in the Wood River Valley of the central part of the U.S. state of Idaho. The population was 6,200 at the 2000 census. Hailey is the site of Friedman Memorial Airport (SUN), the airport for the resort area of Sun Valley/Ketchum, 12 miles (19 km) north. The town of Bellevue is a few miles south. From 1882-95, Hailey was the county seat of now-defunct Alturas County. The elevation of Hailey is 5330 feet (1624 m) above sea level.
The city is named after John Hailey, a two-time Congressional delegate from the Idaho Territory.
Hailey is the current home of retired tennis professional Mats Wilander. Hollywood actors (and former couple) Bruce Willis and Demi Moore also have homes in the town. The poet Ezra Pound was born there in 1885.