Tourism in metropolitan Detroit, Michigan is a significant factor for the region's culture and for its economy, comprising nine percent of the area's two million jobs. About 19 million people visit Metro Detroit spending an estimated 6 billion in 2019. In 2009, this number was about 15.9 million people, spending an estimated $4.8 billion. Detroit is one of the largest American cities and metropolitan regions to offer casino resort hotels. Leading multi-day events throughout Metro Detroit draw crowds of hundreds of thousands to over three million people. More than fifteen million people cross the highly traveled nexus of the Ambassador Bridge and the Detroit-Windsor Tunnel annually. Detroit is at the center of an emerging Great Lakes Megalopolis. An estimated 46 million people live within a 300-mile (480 km) radius of Metro Detroit.

Detroit is the most populous city in the U.S. state of Michigan. It is the largest U.S. city on the United States–Canada border, and the seat of government of Wayne County. Detroit had a population of 639,111 at the 2020 census, making it the 29th-most populous city in the United States. The Metro Detroit area, home to 4.3 million people, is the second-largest in the Midwest after the Chicago metropolitan area and the 14th-largest in the United States. A significant cultural center, Detroit is known for its contributions to music, art, architecture and design, in addition to its historical automotive background.