National Park of American Samoa

National Park of American Samoa spans three separate island units across the South Pacific: Tutuila, Ofu, and Ta'u. Its 8,257 acres protect tropical rainforest, volcanic ridgelines, and coral reef in one of the most remote corners of the U.S. national park system. The Ofu unit holds one of the most intact coral reef systems managed by the NPS, with more than 250 coral species in its shallow lagoon. The park is free to enter and draws about 8,000 visitors per year, the vast majority arriving on Tutuila near the capital of Pago Pago.

The only U.S. national park south of the equator, spread across three island units
- The Ofu coral reef, regarded as one of the most pristine in the National Park System with 250+ coral species
- Pacific flying foxes (Pteropus tonganus), large fruit bats that are the biggest native land animals on the islands
- A unique land arrangement in which the NPS leases all park land from indigenous Samoan villages rather than owning it outright

The park has no campgrounds. No backcountry camping is permitted on any of the three island units. Visitors who want to stay near or within the park can participate in the NPS-affiliated homestay program, which places guests with Samoan families in villages adjacent to the park boundaries. Hosts provide sleeping accommodations in a traditional fale and meals. Rates vary by family and arrangement. Contact the park visitor center in Pago Pago to obtain a current list of participating families and to book in advance; demand for the outer island units (Ofu and Ta'u) is limited and lead time is required.

The park is among the most remote in the National Park System. Reaching it requires a transoceanic flight. From the U.S. mainland, fly to Honolulu and connect to Pago Pago International Airport (PPG) via Hawaiian Airlines; the Honolulu–PPG flight takes about 5.5 hours. Flights also operate from Auckland and Fiji. The Tutuila unit is about 10 miles from the airport and accessible by rental car or taxi. Reaching the Ofu unit requires a 30-minute inter-island flight on Samoa Air from Tutuila to Ofu-Olosega; boat passage is also available but schedules vary. The Ta'u unit is similarly reached by inter-island flight or boat. No car rental is available on Ofu or Ta'u; the communities are small and most sites are walkable from the airstrips.

All three island units sit on the Samoa hotspot, a plume of heat in Earth's mantle that has produced a chain of volcanic islands as the Pacific Plate moves over it. Tutuila is the oldest and most eroded of the three, its original volcanic cone worn down to a rugged spine of ridges and deep valleys. The island's deeply indented harbor at Pago Pago formed where the central cone collapsed and the sea flooded in.

The Manu'a Islands, Ofu and Ta'u, are geologically younger and less eroded. Ta'u rises steeply from the ocean to peaks above 3,000 feet, with near-vertical sea cliffs on the southern coast. Ofu's shallower terrain and sheltered lagoon created the conditions for the dense coral reef that makes it the park's premier snorkeling destination.

Fringing coral reefs formed around each island as volcanic rock subsided and marine organisms colonized the shallow margins. The reef at Ofu is protected from wave energy by the island's shape, giving corals a stable, warm-water environment. Sea surface temperatures near the islands average 82–86°F year-round, supporting one of the most species-rich reef systems under NPS management.

Pacific flying foxes (Pteropus tonganus) are the most visible large animals in the park. These fruit bats have wingspans up to 3 feet and roost in colonies in the forest canopy, taking flight at dusk to feed on fruit and nectar. They are essential pollinators and seed dispersers for the rainforest and are fully protected within the park.

The reef at Ofu supports more than 950 fish species and 250+ coral species. Green sea turtles and hawksbill turtles forage in the lagoon and occasionally nest on the beaches. Spinner dolphins are common offshore. Humpback whales pass through the waters surrounding the Manu'a Islands between July and October on their migration routes.

Seabirds nest on the sea cliffs and offshore rocks throughout the park. White terns, red-footed boobies, and frigatebirds are present year-round. The collared kingfisher, a small turquoise bird found throughout the Pacific islands, is common in the lowland forest on all three units.

Human settlement in the Samoan archipelago dates back more than 3,000 years, making it one of the oldest continuously inhabited island groups in Polynesia. The Fa'asamoa, or Samoan Way, governs a system of communal land ownership, extended family authority, and village governance that has persisted to the present day. This tradition shapes the park's very existence: the federal government holds no title to the park land, instead operating under a 50-year lease agreement signed with the villages of Tutuila and the Manu'a Islands in 1993. The park is the only unit of the national park system established on leased indigenous land.

Dutch explorer Jacob Roggeveen sighted the Samoan Islands in 1722. The United States gained interest in the archipelago in the late nineteenth century because of Pago Pago Harbor's strategic value as a coaling station. The eastern islands, including Tutuila, came under U.S. administration in 1900 when local chiefs ceded them to the Navy. The Manu'a Islands followed in 1904. During World War II, American Samoa hosted a major U.S. Marine base and served as a staging point for Pacific operations; the Japanese never occupied the territory.

Congress authorized the National Park of American Samoa in 1988, with the formal lease with the villages taking effect in 1993. The park was designed from the start as a partnership, with the NPS providing management and the villages retaining ownership, a model intended to respect the Fa'asamoa and ensure local control over ancestral land.