Twin Falls is the county seat and largest city of Twin Falls County, Idaho, United States. The city had a population of 44,125 as of the 2010 census.

Twin Falls is a waterfall on the Snake River in southern Idaho in the Snake River Canyon. The falls is a few miles east of its namesake city, Twin Falls. It is upstream of Pillar Falls and Shoshone Falls. Twin Falls is downstream from Milner Dam. Water flow over Twin Falls is controlled by dams used for irrigation and hydroelectric power generation.

For the city, see Twin Falls, Idaho

Twin Falls Idaho is a 1999 independent film directed by Michael Polish, who co-wrote and co-stars in the film with his identical twin brother, Mark Polish.