Key West is an unincorporated community in Dubuque County, Iowa, United States, near the extreme southern end of the city of Dubuque. Parts of the community are now within the city of Dubuque, while others are unincorporated. Owing to the presence of U.S. Highways 151, 61, and 52, and the nearby Dubuque Regional Airport, the area is home to a growing number of businesses. Some of these are high tech companies being built in the Dubuque Technology Park, to the east.