The area of Nomans Land Island National Wildlife Refuge is 2,589,988.110336 square meters.
The area of Plum Tree Island National Wildlife Refuge is 14.168 square kilometers.
The area of Vieques National Wildlife Refuge is 71.917 square kilometers.
Nomans Land Island National Wildlife Refuge was created in 1975.
Block Island National Wildlife Refuge was created in 1973.
Harbor Island National Wildlife Refuge was created in 1983.
Thacher Island National Wildlife Refuge was created in 1972.
Cat Island National Wildlife Refuge was created in 2000.
Protection Island National Wildlife Refuge was created in 1982.
Merritt Island National Wildlife Refuge was created in 1963.
Pinckney Island National Wildlife Refuge was created in 1975.
Franklin Island National Wildlife Refuge was created in 1973.
Mackay Island National Wildlife Refuge was created in 1960.
Blackbeard Island National Wildlife Refuge was created in 1924.
Wallops Island National Wildlife Refuge was created in 1975.