city, seat (1907) of Twin Falls county, south-central Idaho, U.S. Located near Twin Falls (65 feet 【20 metres】 high), Shoshone Falls (212 feet 【65 metres】), and Auger Falls (140 feet 【43 metres】) of the Snake River, the city is adjacent to a spectacular canyon that bisects the broad, arid river plains. The community, established in 1904, grew up almost overnight with the coming of irrigation and a Union Pacific (Union Pacific Railroad Company) branch railway. It was long primarily an agriculture, trading, and supply centre, with some industrial development, including plastics, hosiery, and farm-machinery manufacturing. During World War II, a relocation camp for Japanese Americans was established on the plain north of Twin Falls; at its height it held more than 10,000 internees. In the 1990s the city's growth was spurred in part by high-tech industry. The (junior) College of Southern Idaho (1964) is located in Twin Falls, as is the headquarters of the Minidoka Division of the Sawtooth National Forest. Inc. village, 1905; city, 1907. Pop. (1990) 27,591; (2000) 34,469.