Detroit, Michigan, the largest city in the state and one of the most populous in the United States. It is the seat of Wayne County. Detroit is located in southeastern Michigan on the Detroit River, the waterway that links Lakes Erie and St. Clair and forms part of the United States—Canadian border. Windsor, Ontario, lies across the river.

Internationally known as the home of the American automobile industry, Detroit is often called the Motor City and the Automobile Capital of the World. Since Henry Ford put America on wheels with the Model T in 1908, the automobile, mass production, and the assembly line have dominated life in the city and made it one of the nation's top-ranking industrial centers. General Motors, Ford, and Chrysler—the Big Three of American automobile manufacturing—and the United Auto Workers union all have their headquarters in or near Detroit.