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.
[3] The
2020 United States census put the population of the Midwest at 68,995,685.
[4] 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.