American Samoa Population and Demographics

American Samoa's population structure reflects the territory's geographic isolation, Polynesian cultural identity, and its unique relationship with the United States federal government. This page covers the demographic composition, population trends, ethnic breakdown, age distribution, and settlement patterns of the territory's resident population, drawing on data from the U.S. Census Bureau and the American Samoa Department of Commerce.

Definition and scope

American Samoa's resident population is counted under U.S. Census Bureau enumeration protocols, although the territory's inhabitants hold a distinct legal status — classified as U.S. nationals rather than U.S. citizens by birth, a legal distinction addressed in depth at American Samoa Citizenship and Nationality Law. The territorial population encompasses residents across the main island of Tutuila, the Manuʻa Islands (Taʻū, Ofu, and Olosega), Rose Atoll, and Swains Island.

The 2020 U.S. Decennial Census recorded American Samoa's resident population at approximately 49,710 (U.S. Census Bureau, 2020 Decennial Census). This represented a decline from the 2010 Census count of 55,519, indicating a net outmigration trend over the intervening decade. The contraction is attributable primarily to emigration to the U.S. mainland and Hawaii, driven by employment opportunities, military service, and educational access.

How it works

Ethnic and racial composition

The population is predominantly of Samoan (Polynesian) descent. The 2020 Census classified approximately 88.9% of residents as Native Hawaiian and Other Pacific Islander alone or in combination (U.S. Census Bureau American Samoa Profile). The remaining population includes individuals of Asian descent (primarily Filipino and Tongan communities), mixed-race individuals, and a small number of residents identifying as white or other ethnicities.

Age and household structure

American Samoa maintains a relatively young population profile compared to U.S. mainland averages. The median age recorded in the 2020 Census was 26.7 years, compared to the U.S. mainland median of 38.8 years. Household sizes are substantially larger than mainland averages — the mean household size in American Samoa is approximately 5.3 persons per household, reflecting the influence of the extended family (aiga) system central to Fa'asamoa cultural practice, documented further at Samoan Culture and Fa'asamoa Traditions.

Language profile

The 2020 Census recorded that approximately 90% of American Samoa's population speaks Samoan at home, with English serving as the co-official language used in government, courts, and formal education. Bilingualism is prevalent across adult age cohorts.

Settlement geography

Tutuila island, where the territorial capital Pago Pago is located, contains roughly 95% of the total population. The Manuʻa Islands collectively hold fewer than 1,400 residents, making them among the most sparsely populated Pacific island communities under U.S. jurisdiction. Swains Island has a permanent population of fewer than 20 individuals.

Common scenarios

Population data use cases

  1. Federal funding allocation — population counts determine American Samoa's eligibility levels under Medicaid, education block grants, and FEMA disaster programs, as outlined at American Samoa Federal Funding and Grants.
  2. Legislative apportionment — the unicameral and bicameral structure of the American Samoa Fono is not apportioned by the federal census but by the territorial constitution; the legislative framework is described at American Samoa Territorial Legislature.
  3. Public health planning — the American Samoa Department of Health uses census demographic breakdowns to plan clinical staffing and disease surveillance at LBJ Tropical Medical Center, the territory's sole full-service hospital.
  4. Military recruitment analysis — American Samoa consistently reports one of the highest per-capita military enlistment rates among all U.S. jurisdictions, a pattern documented at American Samoa Military Presence and Veterans.

Emigration and diaspora

The Hawaiian island of Oahu hosts an estimated Samoan diaspora population exceeding 40,000 individuals with territorial origin ties. The greater Los Angeles area and the Salt Lake City metropolitan area represent additional major diaspora concentrations. This outmigration directly suppresses the territory's resident population count between census cycles.

Decision boundaries

Comparing 2010 and 2020 Census findings

Metric 2010 Census 2020 Census
Total resident population 55,519 49,710
Median age (years) 23.0 26.7
Native Hawaiian/Pacific Islander share ~91% ~88.9%
Mean household size (persons) 5.6 5.3

The 12% population decline between 2010 and 2020 is the sharpest inter-census drop recorded for any U.S. territory in that period (U.S. Census Bureau Island Areas Censuses). The contraction does not reflect natural population decrease — birth rates remain above replacement — but rather net outflow that exceeds natural increase.

Residents vs. nationals: a legal-demographic boundary

The resident population count includes all individuals physically present, regardless of their legal status. However, the politically significant distinction between U.S. nationals born in American Samoa and U.S. citizens is a legal boundary, not a demographic one. This distinction affects passport issuance, voting rights in federal elections, and eligibility for certain federal programs. The full overview of the territory's structure, including how population data intersects with governance, is accessible through the American Samoa Territory Authority reference hub.

The American Samoa Government Authority provides structured reference material on territorial government institutions, administrative frameworks, and public sector operations in the territory — making it a primary resource for professionals and researchers working across governance and demographic planning contexts.

References

Read Next

American Samoa Citizenship and Nationality Law territory whose native-born residents are classified as U.S. Samoan Culture and Fa'asamoa Traditions in American Samoa This page details the structural components of fa'asamoa, its institutional roles, the tensions produced by coexistence with U.S. Federal Funding and Grants in American Samoa This page covers the major categories of federal grants and funding mechanisms applicable to American Samoa, the federal...