Little Conch Key is an island in Monroe County, Florida, United States. It is located in the middle Florida Keys. U.S. 1 (the Overseas Highway) crosses the key at approximately mile marker 62.2, between Duck Key and Conch Key. It is part of the census-designated place of Duck Key. Little Conch Key is also known as Walker's Island. References Islands of the Florida Keys Islands of Monroe County, Florida Islands of Florida