* βeta
| Capital | (*) See Notes at bottom of the table | |||
| N | Flag | Member Countries | name | |
| 1 | Antigua and Barbuda | Saint John's | ||
| 2 | Argentina | Buenos Aires | ||
| 3 | Bahamas | Nassau | ||
| 4 | Barbados | Bridgetown | ||
| 5 | Belize | Belmopan | ||
| 6 | Bolivia | La Paz | ||
| 7 | Brazil | Brasilia | ||
| 8 | Canada | Ottawa | ||
| 9 | Chile | Santiago | ||
| 10 | Colombia | Bogota | ||
| 11 | Costa Rica | San Jose | ||
| 12 | Dominica | Roseau | ||
| 13 | Dominican Republic | Santo Domingo | ||
| 14 | Ecuador | Quito | ||
| 15 | El Salvador | San Salvador | ||
| 16 | Grenada | Saint George's | ||
| 17 | Guatemala | Guatemala City | ||
| 18 | Guyana | Georgetown | ||
| 19 | Haiti | Port-au-Prince | ||
| 20 | Honduras | Tegucigalpa | ||
| 21 | Jamaica | Kingston | ||
| 22 | Mexico | Mexico City | ||
| 23 | Nicaragua | Managua | ||
| 24 | Panama | Panama City | ||
| 25 | Paraguay | Asuncion | ||
| 26 | Peru | Lima | ||
| 27 | Saint Kitts and Nevis | Basseterre | ||
| 28 | Saint Lucia | Castries | ||
| 29 | Saint Vincent and the Gr... | Kingstown | ||
| 30 | Suriname | Paramaribo | ||
| 31 | Trinidad and Tobago | Port-of-Spain | ||
| 32 | United States | Washington, DC | ||
| 33 | Uruguay | Montevideo | ||
| 34 | Venezuela | Caracas | ||
| Abbreviation : OAS Title : Organization of American States Aim : to promote regional peace and security as well as economic and social development. Established in : 14 April 1890 as the International Union of American Republics; 30 April 1948 adopted present charter; effective - 13 December 1951 |
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| Capital name | ||||