Detroit is in South America.
Detroit ( [ dᵻˈtrɔɪt ] ) is the most populous city in the U.S. state of Michigan , the largest city on the United States -- Canada border , and the seat of Wayne County . The Detroit Metropolitan Airport is among the most important hubs in the United States . Detroit and its neighboring Canadian city Windsor are connected through a tunnel and the Ambassador Bridge , the busiest international crossing in North America .