Detroit is the largest city in the U.S. state of Michigan and Metro Detroit is the second largest metropolitan area in the Midwestern United States. Detroit is a major port city on the Detroit River, in the Midwest region of the United States. Located north of Windsor, Ontario Detroit is a geographically unique as the only U.S. city that looks south to Canada. It was founded in 1701 by the Frenchman Antoine de la Mothe Cadillac.

It is known as the world's traditional automotive center — "Detroit" is a metonym for the American automobile industry — and an important source of popular music, legacies celebrated by the city's two familiar nicknames, Motor City and Motown. Other nicknames emerged in the twentieth century, including Rock City, Arsenal of Democracy (during World War II), The D, D-Town, and The 3-1-3 (its area code). The metropolitan area is an important center for research and development; its broad based economy includes advanced manufacturing, robotics, biotechnology, information technology, and finance. Metro Detroit attracts about 15.9 million visitors annually.

In 2008, Detroit ranked as the United States' eleventh most populous city, with 910,920 residents. A population shift to the suburbs began in the 1950s and continued as the metropolitan area grew to one of the nation's largest. The name Detroit sometimes refers to the Metro Detroit area, a sprawling region with a population of 4,425,110 for the Metropolitan Statistical Area, and 5,354,225 for the Combined Statistical Area, making it the nation's eleventh-largest as of the 2008 Census Bureau estimates. The Windsor-Detroit area, a critical commercial link straddling the Canada-U.S. border, has a total population of about 5,800,000.