ASTHO's members include the chief health officials of the five U.S. territories and three freely associated states (FAS). These eight jurisdictions are collectively referred to as the island areas or island jurisdictions.
Each island jurisdiction has a unique history, culture, government structure, and relationship with the United States. When working with the island areas, it is important to understand the differences among and between island jurisdictions and the contiguous United States.
Sovereignty is a significant difference between the U.S. territories and FAS. The FAS are independent nations connected to the U.S. through the Compacts of Free Association, under which the U.S. government agreed to provide economic and technical assistance, ensure U.S. military defense support, and allow unrestricted travel to and from the United States for these non-resident FAS citizens. In return, the FAS agreed to give the U.S. Government unlimited and exclusive use of their land and waterways for strategic purposes. The U.S. territories are under the jurisdiction of the U.S. government, and territorial residents are U.S. citizens or nationals.
Other distinctions include citizenship and differences in federal program and funding eligibility such as Medicaid, Medicare, SSI, and Veterans Affairs. The chart on this page summarizes these differences in political status, citizenship, visa requirements, and Medicaid and Medicare eligibility between the island jurisdictions.
Take It To Go
A PDF version of the island jurisdiction profiles is available for download.
Table 1: Territories and Freely Associated States
Jurisdiction | Flag | Political Status | U.S. Citizens? | Vote for U.S. President? | Reside/Work/Travel in U.S.? | Medicaid/Medicare Eligible? | Serve in U.S. Military? |
---|---|---|---|---|---|---|---|
Puerto Rico | ![]() |
Territory | Yes | No | Yes | Yes, capped | Yes |
USVI | ![]() |
Territory | Yes | No | Yes | Yes, capped | Yes |
Guam | ![]() |
Territory | Yes | No | Yes | Yes, capped | Yes |
American Samoa | ![]() |
Territory | No (U.S. Nationals) | No | Yes | Yes, capped | Yes |
CNMI | ![]() |
Territory | Yes | No | Yes | Yes, capped | Yes |
RMI | ![]() |
Sovereign (except military) | No | No | Yes | No (migrants in U.S.: yes, 2021) | Yes |
FSM | ![]() |
Sovereign (except military) | No | No | Yes | No (migrants in U.S.: yes, 2021) | Yes |
Palau | ![]() |
Sovereign (except military) | No | No | Yes | No (migrants in U.S.: yes, 2021) | Yes |
Health in the Island Areas
Each island jurisdiction has its own unique context and needs, which are important to understand when partnering with them. To learn more about a jurisdiction's health system, history, and relationship with the U.S., click on the corresponding links below.

American Samoa
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Commonwealth of the Northern Mariana Islands
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Federated States of Micronesia
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Guam
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Puerto Rico
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Republic of Palau
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Republic of the Marshall Islands
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