As of 13 December 2011, there were 555 National Wildlife Refuges in the United States. Refuges that have boundaries in multiple states are listed only in the state where the main visitor entrance is located. The newest refuge established is the Cherry Valley National Wildlife Refuge in Pennsylvania.[1]
The United States is divided into seven regions for administrative purposes:
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AL | AK | AZ | AR | CA | CO | CT | DE | FL | GA | HI | ID | IL | IN | IA | KS | KY | LA | ME | MD | MA | MI | MN | MS | MO | MT | NE | NV | NH | NJ | NM | NY | NC | ND | OH | OK | OR | PA | RI | SC | SD | TN | TX | UT | VT | VA | WA | WV | WI | WY | PR | VI | Insular areas |
List of largest National Wildlife Refuges
US Fish and Wildlife Service list of National Wildlife Refuges