Totten Key is an island in the Upper Florida Keys in Biscayne National Park. It is in Miami-Dade County, Florida.
It is located in southern Biscayne Bay, just west of Old Rhodes Key.
It was probably named for General Joseph Totten who was Chief of Engineers for the U.S. Army. In 1848, Totten was in charge of a survey of the Florida coast concentrating on Biscayne Bay, with Robert E. Lee as a subordinate.
U.S. Coast Survey Chart #68, Florida Reefs, Key Biscayne to Carysfort Reef (1858) has Totten’s Key.