Duck Key is a census-designated place in Monroe County, Florida, on an island of the same name in the middle Florida Keys. The CDP also includes the neighboring island of Conch Key. As of the 2000 census, the CDP had a total population of 443.

Geography
Duck Key is located oceanside of U.S. Route 1 in Florida (or the Overseas Highway), at approximately mile marker 61, between Conch Key and Grassy Key at (24.775623, -80.910972).

According to the United States Census Bureau, the CDP has a total area of 2.4 km² (0.9 mi²). 2.2 km² (0.9 mi²) of it is land and 0.1 km² (0.1...

Duck Key is a census-designated place in Monroe County, Florida, on an island of the same name in the middle Florida Keys. The CDP also includes the neighboring island of Conch Key. As of the 2000 census, the CDP had a total population of 443.

Geography
Duck Key is located oceanside of U.S. Route 1 in Florida (or the Overseas Highway), at approximately mile marker 61, between Conch Key and Grassy Key at (24.775623, -80.910972).

According to the United States Census Bureau, the CDP has a total area of 2.4 km² (0.9 mi²). 2.2 km² (0.9 mi²) of it is land and 0.1 km² (0.1 mi²) of it (5.49%) is water.

There is also an island called Duck Key that is located in North Port, Florida. Duck Key is a deed restricted community and is located at the end of Pan American Blvd.

History
The key was the site of a salt manufacturing operation in the 1820s - 1830s. Occupation of the island ceased after the hurricane of 1935 and did not resume until the key was connected to the highway by a causeway in 1953. J.W. Norie, in his Piloting Directions for the Gulf of Florida, The Bahama Bank - Islands (1828) states:'Duck Key - Some two miles (3 km) long, low, rocky, - covered with mangroves; some small patches of good land with a little timber. This island formerly saltworks but they were transferred latterly to Key West, owned by Mr. Howe, who is also possessor of this Key. 'Hawk's Cay Resort is currently located here, and the island is sometimes known by that name.