The area of Key Cave National Wildlife Refuge is 4,289,667.807744 square meters.
The area of Sauta Cave National Wildlife Refuge is 1,068,370.0955136 square meters.
The area of Fern Cave National Wildlife Refuge is 805,324.4280576 square meters.
The area of Logan Cave National Wildlife Refuge is 497,763.33995520003 square meters.
The area of Choctaw National Wildlife Refuge is 17.07 square kilometers.
The area of Aransas National Wildlife Refuge is 464 square kilometers.
The area of Driftless Area National Wildlife Refuge is 3,286,006.946424576 square meters.
The area of Desecheo National Wildlife Refuge is 1,456,868.312064 square meters.
The area of Catahoula National Wildlife Refuge is 101.827 square kilometers.
The area of Tetlin National Wildlife Refuge is 2,833.034 square kilometers.
The area of Toppenish National Wildlife Refuge is 8,004,682.003507201 square meters.
The area of Pahranagat National Wildlife Refuge is 21.772 square kilometers.
The area of Aroostook National Wildlife Refuge is 21.254 square kilometers.