Duck Key is a census-designated place and unincorporated community in Monroe County, Florida, United States, on an island of the same name in the middle Florida Keys.

The nine-hole par 3 course designed by Robert Trent Jones was removed to make room for a resort expansion approved in 1986.

Additional swimming pools and recreational facilities were added in the late 1990s.

This added several hundred Caribbean-style cottages all with water views, porches and the traditional white picket fence.

The racial makeup of the CDP was 98.65% White, 0.45% black, 0.23% Asian, and 0.68% from two or more races.

33.2% of all households were made up of individuals, and 14.9% had someone living alone who was 65 years of age or older.