Sioux City (pronounced /ˌsuːˈsɪti/) is a city located in northwest Iowa in the United States. As of the 2000 census, the city had a total population of 85,013. The 2006 census estimate indicated a slight decline to 83,262. Sioux City is the pimary city of the four-county Sioux City, IA-NE-SD Metropolitan Statistical Area (MSA), with a population of 143,053 in 2000 and a slight decline to an estimated 142,794 in 2007; however, the population has been increasing again since 2005. The Sioux City-Vermillion, IA-NE-SD Combined Statistical Area has an estimated population of 156,158 as of 2007. It is the county seat of Woodbury County.
Sioux City is at the navigational head of the Missouri River, about 90 miles (140 km) north of the Omaha-Council Bluffs metropolitan area. Sioux City and the surrounding areas of northwestern Iowa, northeastern Nebraska and southeastern South Dakota are sometimes referred to as Siouxland, especially by the local media. Sioux City is the second largest city in the Sioux Falls-Sioux City, SD-IA-MN-NE Designated Market Area (DMA),with a population of 1,043,450.
Sioux City is the home of Morningside College, Briar Cliff University, St. Luke's College and Western Iowa Tech Community College.