Cudjoe Key is located at (24.664298, -81.482339) [REF].
According to the United States Census Bureau, the CDP has a total area of 14.6 km2 (5.6 mi2), of which 13.6 km2 (5.2 mi2) is land and 1.0 km2 (0.4 mi2) (6.93%) is water.