International organisation

Organization of American States

The Americas' regional organisation under Chapter VIII of the UN Charter, seating 35 states of the hemisphere.

Abbreviation
OAS
Founded
1948
Headquarters
United States, Pan American Union Building
Member states
34 resolved, 35 published by the organisation
Official site
https://www.oas.org/

The two counts differ. Organization of American States publishes 35 members; 34 resolved against the 193 states this site has checked. Sometimes that is a disagreement about what counts as a member state — a non-UN state, a territory, a suspended member — and sometimes the compiled source lacks a current statement for a real one. Either way the gap is shown rather than smoothed over, because a table that quietly shows one number cannot be checked against the other.

Member states

Ordered by accession. A state with no recorded date is listed last rather than given one.

A joining date is the one the source records, which may be the day a treaty was signed or the day it took effect. States that joined together can therefore differ by months here.

StateJoinedListed by the source as
Argentina 1948
Bolivia 1948
Brazil 1948
Chile 1948
Colombia 1948
Costa Rica 1948
Cuba 1948
Dominican Republic 1948
Ecuador 1948
El Salvador 1948
Guatemala 1948
Haiti 1948
Honduras 1948
Mexico 1948
Nicaragua 1948
Panama 1948
Paraguay 1948
Peru 1948
United States 1948
Uruguay 1948
Barbados 1967
Trinidad and Tobago 1967
Jamaica 1969
Grenada 1975
Suriname 1977
Dominica 1979
Saint Lucia 1979
Antigua and Barbuda 1981
Saint Vincent and the Grenadines 1981
The Bahamas 1982
Saint Kitts and Nevis 1984
Canada 1990
Belize 1991
Guyana 1991

This site is an independent reference. It is not affiliated with, endorsed by, or a publication of Organization of American States.

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