Key West is a city in Monroe County, Florida, United States. Key West is the county seat of Monroe County and the southernmost city in the Continental United States. It also contains the southern terminus of U.S. 1, State Road A1A, the East Coast Greenway and, before 1935, the Florida East Coast Railway. In the heart of Key West on Duval Street, the Strand's front facade has been carefully restored and is now the unusual store front of a neighborhood Walgreens