Homes for Sale in Carey Idaho: Carey is a city in Blaine County, Idaho, United States. The population was 604 at the 2010 census. Carey is primarily an agricultural city and is the location of the Blaine County Fairgrounds. Nearby recreational destinations include the Craters of the Moon National Monument, Carey Lake, Silver Creek and the Little Wood River. Further west is the Big Wood River Valley, leading to the Sun Valley resort. In recent years, the city of Carey has experienced significant growth.