Sun Valley
- County:
- Blaine County
- County Seat:
- No
- Area (mi²):
- 9.565
- State:
- Idaho
Sun Valley is a city located in Blaine County, Idaho. Sun Valley has a 2026 population of 1,771. Sun Valley is currently declining at a rate of -0.62% annually and its population has decreased by -1.06% since the most recent census, which recorded a population of 1,790 in 2020.