The Midwestern United States, also referred to as the Midwest or the American Midwest, is one of four census regions of the United States Census Bureau. It occupies the northern central part of the United States. It was officially named the North Central Region by the U.S. Census Bureau until 1984. It is between the Northeastern United States and the Western United States, with Canada to the north and the Southern United States to the south.
The U.S. Census Bureau's definition consists of 12 states in the north central United States: Illinois, Indiana, Iowa, Kansas, Michigan, Minnesota, Missouri, Nebraska, North Dakota, Ohio, South Dakota, and Wisconsin. The region generally lies on the broad Interior Plain between the states occupying the Appalachian Mountain range and the states occupying the Rocky Mountain range. Major rivers in the region include, from east to west, the Ohio River, the Upper Mississippi River, and the Missouri River. The 2020 United States census put the population of the Midwest at 68,995,685. The Midwest is divided by the U.S. Census Bureau into two divisions. The East North Central Division includes Illinois, Indiana, Michigan, Ohio, and Wisconsin, all of which are also part of the Great Lakes region. The West North Central Division includes Iowa, Kansas, Minnesota, Missouri, North Dakota, Nebraska, and South Dakota, several of which are located, at least partly, within the Great Plains region.
Chicago is the most populous city in the American Midwest and the third most populous in the United States. Chicago and its suburbs, together called Chicagoland, form the largest metropolitan area with 10 million people, making it the fourth largest metropolitan area in North America, after Greater Mexico City, the New York metropolitan area, and Greater Los Angeles. Other large Midwestern cities include Columbus, Indianapolis, Detroit, Milwaukee, Kansas City, Omaha, Minneapolis, Wichita, Cleveland, St. Paul, St. Louis, and Cincinnati. Large Midwestern metropolitan areas include Metro Detroit, Minneapolis–St.