The area of Klamath Basin National Wildlife Refuge Complex is 776.996 square kilometers.
Klamath Basin National Wildlife Refuge Complex was created in 1908.
Klamath Marsh National Wildlife Refuge was created in 1958.
Upper Klamath National Wildlife Refuge was created in 1928.
Lower Klamath National Wildlife Refuge was created in 1908.
The area of Upper Klamath National Wildlife Refuge is 69.578 square kilometers.
The area of Lower Klamath National Wildlife Refuge is 206.038 square kilometers.
San Diego National Wildlife Refuge Complex was created in 1972.
Caribbean Islands National Wildlife Refuge Complex was created in 1974.
Mark Twain National Wildlife Refuge Complex was created in 1958.
The area of Theodore Roosevelt National Wildlife Refuge Complex is 404.686 square kilometers.
Emiquon National Wildlife Refuge was created in 2000.
Matlacha Pass National Wildlife Refuge was created on 1908-09-26.