Sioux Falls

Sioux Falls ( soo FAWLZ) is the most populous city in the U.S. state of South Dakota. It is the county seat of Minnehaha County and also extends into northern Lincoln County. The population was 192,517 at the 2020 census (estimated at 209,289 in 2024). The Sioux Falls metropolitan area, with an estimated 308,000 residents, accounts for more than one-third of South Dakota's population. Chartered in 1856 on the banks of the Big Sioux River, the city is at the junction of Interstates 29 and 90.