Key is a cdp located in Monroe County, in the state of Florida (FL), United States. Nestled in the South Atlantic division of the South region, it covers an area of 1.4 square miles (4.0 km²) and sits at an elevation of 5 ft. With a population of approximately 2,595 residents, Key offers a peaceful, rural atmosphere.
The town's population is composed of about 54.41% males and 45.59% females, and it has a population density of 880.43 people per square mile (726.04/km²). Key lies at a latitude of 24.6 and a longitude of -81.66, operating in the UTC-5.
Locals reflect a blend of American ancestry, with roots primarily in United States (8.1%), followed by English (11%), German (11.8%), and Scotch-Irish (0%) heritage. The town is identified by the ZIP code 33040.