Buhl is a city located on the old Oregon Trail in the western half of Twin Falls County, Idaho. The population was 4,122 at the time of the 2010 census, up from 3,985 in 2000. It is part of the Twin Falls, Idaho metropolitan area.

Twin Falls County is a county in the south central part of the U.S. state of Idaho. As of the 2020 census, the population was 90,046, making it the fifth-most populous county in Idaho. The county seat and largest city is Twin Falls. Twin Falls County is part of the Twin Falls, ID Twin Falls Metropolitan Statistical Area.