Elliott Key is the northernmost of the true
Florida Keys (those 'keys' which are ancient
coral reefs lifted above the present
sea level), and the largest key north of
Key Largo. It is located entirely within
Biscayne National Park, in
Miami-Dade County, Florida, east of
Homestead, Florida. It is bordered by the
Atlantic Ocean to the east,
Biscayne Bay to the west,
Sands Key (across Sands Cut) to the north and
Old Rhodes Key (across Caesar Creek) to the south.
Adams Key is just west of the southern end of Elliott Key. Elliott Key is about seven miles (11 km) long. Its maximum width is about near the north end and its average width is less than . The higher elevations on the island range from 6 to above sea level and occur generally along an unimproved road that runs longitudinally through the center of the island. The average elevation is about above sea level. The key is accessible only by boat. Elliot Key has a
National Park Service campground, but is otherwise uninhabited.