Sioux City, Iowa

Sioux City is a city in Plymouth and Woodbury counties in the western part of the U.S. state of Iowa. The population was 82,684 in the 2010 census, a decline from 85,013 in the 2000 census, which makes it currently the fourth largest city in the state.

Sioux City is the primary city of the four-county Sioux City, IA–NE–SD Metropolitan Statistical Area (MSA), with a population of 143,005 in 2000 and a slight increase to an estimated 144,360 in 2009. The Sioux City-Vermillion, IA-NE-SD Combined Statistical Area had a population of 156,503 as of 2000 and has grown to an estimated population of 157,850 as of 2009.