The National Park of American Samoa is a national park in the United States territory of American Samoa, distributed across four islands: Tutuila, Ofu, Olosega, and Ta‘ū. The park preserves and protects coral reefs, tropical rainforests, fruit bats, and the Samoan culture. Popular activities include hiking and snorkeling. Of the park's 8,257 acres (3,341 ha), 2,500 acres (1,000 ha) is coral reefs and ocean. The park is the only American National Park Service system unit south of the equator.

American Samoa is an unincorporated territory of the United States located in the South Pacific Ocean, southeast of the island country of Samoa. Centered on 14.3°S 170.7°W, it is east of the International Date Line and the Wallis and Futuna Islands, west of the Cook Islands, north of Tonga, and some 500 kilometers (310 mi) south of Tokelau. American Samoa is the southernmost territory of the United States and one of two U.S. territories south of the Equator, along with the uninhabited Jarvis Island.