Sands Key is an island north of the upper Florida Keys in Biscayne National Park. It is in Miami-Dade County, Florida. It is located in lower Biscayne Bay, between Elliott Key and Boca Chita Key. Earlier names for the island were "Las Tetas", "The Paps", "Pownal Kay", "Pownall Island", "Restinga de Las Tetas" and "Saunder's Key".