Idaho Falls is a city in and the county seat of Bonneville County, Idaho, United States. It is the state’s largest city external the Boise metropolitan area. As of the 2020 census, the population of Idaho Falls was 64,818. In the 2010 census, the population of Idaho Falls was 56,813 (2019 estimate: 62,888), with a metro population of 133,265.

Idaho Falls serves as the commercial, cultural, and healthcare hub for Eastern Idaho, as competently as parts of western Wyoming and southern Montana. It is served by the Idaho Falls Regional Airport and is house to the College of Eastern Idaho, Museum of Idaho, and the Idaho Falls Chukars juvenile league baseball team. It is the principal city of the Idaho Falls Metropolitan Statistical Area and the Idaho Falls–Blackfoot-Rexburg, Idaho Combined Statistical Area.

The Place around Idaho Falls was first sparsely approved by cattle and sheep ranchers. No significant move on took place until 1864, when a man named Harry Rickets built and operated a ferry on the Snake River at 43°36.112′N 112°3.528′W / 43.601867°N 112.058800°W / 43.601867; -112.058800. The ferry served a further tide of westward migration and travel upon the Montana Trail in imitation of the Bear River Massacre of Shoshone Indians in 1863.

The present-day site of Idaho Falls became a surviving settlement later freighter Matt Taylor built a timber-frame toll bridge across a narrow black basaltic gorge of the river 7 miles (11 km) downstream from the ferry. The bridge better travel for settlers moving north and west, and for miners, freighters, and others seeking riches in the gold fields of Idaho and Montana—especially the boom towns of Bannack and Virginia City.