Twin Falls is the county chair and largest city of Twin Falls County, Idaho, United States. The city had a population of 51,807 as of the 2020 census. In the Magic Valley region, Twin Falls is the largest city in a one-hundred-mile (160 km) radius, and is the regional commercial center for south-central Idaho and northeastern Nevada. It is the principal city of the Twin Falls Metropolitan Statistical Area, which officially includes the entirety of Twin Falls and Jerome counties. The affix town resort community of Jackpot, Nevada, fifty miles (80 km) south at the disclose line, is unofficially considered share of the greater Twin Falls area. Located upon a broad plain at the south rim of the Snake River Canyon, Twin Falls is where daredevil Evel Knievel attempted to jump across the canyon in 1974 upon a steam-powered rocket. The jump site is northeast of central Twin Falls, midway amongst Shoshone Falls and the Perrine Bridge.

Excavations at Wilson Butte Cave close Twin Falls in 1959 revealed evidence of human activity, including arrowheads, that rank in the middle of the oldest out of date artifacts in North America. Later Native American tribes predominant in the Place included the Northern Shoshone and Bannock.

The first people of European ancestry to visit the Twin Falls area are believed to be members of a help led by American Wilson Price Hunt, which attempted to fire an all-water trail westward from St. Louis, Missouri, to Astoria, Oregon, in 1811 and 1812. Hunt’s expedition met as soon as disaster: much of his expedition was destroyed and one man was killed in rapids on the Snake River known as Caldron Linn near present-day Murtaugh. Hunt and the remaining members of his expedition completed the journey to Astoria by land.

In 1812 and 1813, Robert Stuart successfully led an overland expedition eastward from Astoria to St. Louis, which passed through the Twin Falls area. Stuart’s route formed the basis of what became the Oregon Trail. Some 150 years later, Robert Stuart Middle School in Twin Falls was named in his honor.