The area of Key Cave National Wildlife Refuge is 4,289,667.807744 square meters.
The area of Fern Cave National Wildlife Refuge is 805,324.4280576 square meters.
The area of Sauta Cave National Wildlife Refuge is 1,068,370.0955136 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 Arrowwood National Wildlife Refuge is 64.483 square kilometers.
The area of Kofa National Wildlife Refuge is 2,692.778 square kilometers.
The area of Chautauqua National Wildlife Refuge is 17.758 square kilometers.
The area of Pahranagat National Wildlife Refuge is 21.772 square kilometers.
The area of Togiak National Wildlife Refuge is 16,602.378 square kilometers.
The area of Waccamaw National Wildlife Refuge is 92.798 square kilometers.