Great Falls is the third most populous city in the U.S. state of Montana and the county seat of Cascade County. The population was 60,442 according to the 2020 census. The city covers an area of 22.9 square miles (59 km²) and is the principal city of the Great Falls, Montana, Metropolitan Statistical Area, which encompasses everything of Cascade County. The Great Falls MSA’s population stood at 84,414 in the 2020 census.

A cultural, commercial and financial center in the central allowance of the state, Great Falls is located just east of the Rocky Mountains and is bisected by the Missouri River. It is 180 miles (290 km) from the east entrance to Glacier National Park in northern Montana, and 264 miles (425 km) from Yellowstone National Park in southern Montana and northern Wyoming. A north–south federal highway, Interstate 15, serves the city.

Great Falls is named for a series of five waterfalls located upon the Missouri River north and east of the city. The Lewis and Clark Expedition of 1805–1806 was annoyed to portage vis-а-vis a 10-mile (16 km) stretch of the river in order to bypass the falls; the company spent 31 days in the area, performing arduous labor to make the portage. Three of the waterfalls, known as Black Eagle, Rainbow and the Great Falls (or the huge Falls), are in the midst of the sites of five hydroelectric dams in the area, giving the city its moniker, “The Electric City”. Other nicknames for Great Falls include “The River City” and “Western Art Capital of the World”. The city is also house to two military installations: Malmstrom Air Force Base east of the city, which is the community’s largest employer; and the Montana Air National Guard to the west, adjacent to Great Falls International Airport. The federally certified Little Shell Tribe of Chippewa Indians of Montana are located in Great Falls.

Great Falls is a popular tourist destination in Montana, with one million overnight visitors annually, who spend an estimated $185 million even though visiting, according to the Great Falls Montana Tourism group. Among Montana cities, Great Falls boasts the greatest number of museums, with 10, including the Lewis and Clark Interpretive Center close Giant Springs and the C. M. Russell Museum and Original Log Cabin Studio upon the city’s north side. Great Falls was the largest city in Montana from 1950 to 1970, when it was eclipsed by Billings in the 1970 census; Missoula assumed second place in 2000.