Key West (Spanish: Cayo Hueso) is an island in the Straits of Florida, within the U.S. state of Florida. Together with all or parts of the separate islands of Dredgers Key, Fleming Key, Sunset Key, and the northern part of Stock Island, it constitutes the City of Key West.
The Island of Key West is about 4 miles (6 kilometers) long and 1 mile (2 km) wide, with a total land area of 4.2 square miles (11 km2). It lies at the southernmost end of U.S. Route 1, the longest north–south road in the United States. Key West is about 95 miles (153 km) north of Cuba at their closest points. It is also 130 miles (210 km) southwest of Miami by air, about 165 miles (266 km) by road, and 106 miles (171 km) north-northeast of Havana.
The City of Key West is the county seat of Monroe County, which includes all of the Florida Keys and part of the Everglades. The total land area of the city is 5.6 square miles (14.5 km2). The official city motto is "One Human Family".
Key West is the southernmost city in the contiguous United States and the westernmost island connected by highway in the Florida Keys. Duval Street, its main street, is 1.1 miles (1.8 km) in length in its 14-block-long crossing from the Gulf of Mexico to the Straits of Florida and the Atlantic Ocean.