Oakley is a city in Cassia County, Idaho, United States. The population was 763 at the 2010 census. It is part of the Burley, Idaho Micropolitan Statistical Area.
Oakley is located at 42°14′32″N 113°52′51″W / 42.24222°N 113.88083°W / 42.24222; -113.88083 (42.242360, -113.880904), at 4,560 feet in elevation. It is at the very southern limit of the Snake River Plain, and close to Goose Creek, between the Middle and Albion Mountains.
According to the United States Census Bureau, the city has a total area of 4.0 square miles (10.3 km²), all of it land.