How American Samoa Became a U.S. Territory

The acquisition of American Samoa by the United States resulted from a series of formal treaty instruments executed between 1900 and 1904, binding the islands to U.S. sovereignty through the voluntary cession of Samoan chiefs rather than military conquest. This status — unincorporated territory — carries specific legal, constitutional, and administrative consequences that remain structurally distinct from incorporated territories and U.S. states. The mechanisms of cession, the competing colonial interests of Germany and Great Britain, and the statutory framework that followed collectively define how American Samoa's relationship with the federal government was established.

Definition and Scope

American Samoa is an unincorporated, unorganized U.S. territory located in the South Pacific Ocean, approximately 2,600 miles southwest of Honolulu, Hawaii. "Unincorporated" designates a territory where the U.S. Constitution applies only in part — specifically, the fundamental rights provisions apply, while other constitutional protections require explicit congressional extension. "Unorganized" means Congress has not passed an Organic Act establishing a formal territorial government structure, though American Samoa has operated under its own locally adopted constitution since 1967.

The territorial status was established through two principal instruments:

1. The Deed of Cession of Tutuila (April 17, 1900) — Signed by the chiefs of Tutuila and Aunu'u, transferring sovereignty over those islands to the United States.
2. The Deed of Cession of Manu'a (July 16, 1904) — Signed by the paramount chief Tui Manu'a Elisara, extending U.S. sovereignty to the Manu'a Islands, including Ta'ū, Ofu, and Olosega.

The United States Congress did not formally ratify these deeds until 1929 (48 U.S.C. § 1661), a 29-year gap that left the territory in a legally ambiguous administrative state. Swains Island was incorporated into the territory by the Act of March 4, 1925.

For a structured reference covering the full scope of territorial governance structures and federal relationships, the American Samoa Government Authority provides detailed coverage of the administrative and statutory framework governing the territory.

How It Works

The legal mechanism underpinning American Samoa's status flows from the Insular Cases — a series of U.S. Supreme Court decisions issued between 1901 and 1922. These rulings established the doctrine that Congress, not the Constitution automatically, determines which rights extend to unincorporated territories. The most cited of these cases, Downes v. Bidwell (182 U.S. 244, 1901), held that unincorporated territories belong to but are not part of the United States for full constitutional purposes.

Administration of the territory operates through a layered structure:

1. Federal level — The U.S. Department of the Interior holds federal oversight authority over American Samoa (Office of Insular Affairs, U.S. Department of the Interior).
2. Territorial government — The American Samoa Government (ASG) operates under the Revised Constitution of American Samoa (1967, amended 1977), with a Governor, Lieutenant Governor, bicameral legislature (the Fono), and judiciary.
3. Local/village level — The fa'amatai (chiefly title system) retains formal legal recognition under territorial law, including control over communal land ownership, which is restricted to persons of Samoan descent by territorial statute.

American Samoans occupy a legally unique nationality status: they are U.S. nationals, not U.S. citizens by birth, under 8 U.S.C. § 1408. This means they hold a U.S. passport but cannot vote in federal elections unless they naturalize as citizens after establishing U.S. state residency. This distinction separates American Samoa from all other inhabited U.S. territories, whose residents hold birthright citizenship under the Jones Act framework or equivalent legislation. Further analysis of citizenship and nationality classifications is available at American Samoa Citizenship and Nationality Law.

Common Scenarios

The circumstances under which American Samoa's territorial acquisition becomes operationally relevant include:

• Nationality and travel documentation — American Samoans born in the territory receive U.S. nationality documentation (U.S. passport noting "non-citizen national") rather than full citizenship credentials, affecting voting eligibility and certain federal employment categories.
• Land tenure disputes — Approximately 90% of land in American Samoa is classified as communal land, protected by territorial statute from alienation to non-Samoans. Federal courts have applied different levels of constitutional scrutiny to these restrictions compared to analogous property laws in U.S. states.
• Federal funding eligibility — The territory participates in selected federal grant programs but is excluded from others available to the 50 states. Medicaid funding in American Samoa operates under a capped block grant structure rather than the open-ended federal matching available to states (Centers for Medicare & Medicaid Services).
• Military service — American Samoans enlist in the U.S. Armed Forces at a per-capita rate that exceeds all 50 states, despite holding national rather than citizen status. Veterans' benefits and eligibility rules track federal statute applicable to all U.S. nationals.

Decision Boundaries

The core legal distinction separating American Samoa from other U.S. territories is the absence of an Organic Act granting congressional citizenship. Puerto Rico, Guam, the U.S. Virgin Islands, and the Commonwealth of the Northern Mariana Islands each received statutory birthright citizenship through separate congressional acts. American Samoa did not.

The distinction between incorporated and unincorporated status is equally operative: incorporated territories (such as Alaska and Hawaii before statehood) are constitutionally on a path toward potential statehood with full constitutional application. Unincorporated territories have no constitutionally mandated statehood trajectory. Congress retains plenary authority under the Territory Clause (U.S. Constitution, Article IV, Section 3, Clause 2) to determine the territorial government's structure, powers, and future status.

Comparative territorial status determinations relevant to American Samoa's position within the broader U.S. insular framework are covered in detail at American Samoa vs. Other U.S. Territories, and the foundational historical record is documented at American Samoa Territory History and Origin.

The American Samoa Territory Authority home provides the primary reference index for all territorial subject categories.

References

• 48 U.S.C. § 1661 — Cession by Samoa (House Office of Law Revision Counsel)
• 8 U.S.C. § 1408 — Nationals but not citizens of the United States at birth (House Office of Law Revision Counsel)
• U.S. Constitution, Article IV, Section 3, Clause 2 — Territory Clause (Congress.gov)
• Office of Insular Affairs, U.S. Department of the Interior
• Centers for Medicare & Medicaid Services — Territories
• Downes v. Bidwell, 182 U.S. 244 (1901) — Supreme Court of the United States
• Revised Constitution of American Samoa (1967) — Office of the Attorney General of American Samoa, via DOI