The Trust for the Americas
- Non-profit organization supports the OAS by fostering partnerships among corporations, foundations, academia, and governmental bodies. [English, Spanish]
- http://www.trustfortheamericas.org/

Wikipedia - Organization of American States
- Hyperlinked encyclopedia entry provides the purposes, history, agencies and member states of the OAS.
- http://en.wikipedia.org/wiki/Organization_of_American_States

Organization of American States Department of International Law
- Advises OAS and organizes various activities that contribute to the development and codification of international law in the Americas. Treaty and agreement information, publications, course and seminar descriptions, and current news provided.
- http://www.oas.org/dil/Department_of_International_Law.htm

Inter-American Defense Board
- An international committee of nationally appointed defense officials that develops collaborative approaches on common defense and security issues facing the Americas.
- http://www.jid.org/

Columbus Memorial Library
- Responsible for the archives and records management of the OAS, and for preserving OAS official documents, as well as carrying out the functions of a traditional library.
- http://tlc.library.net/columbus/

Foreign Trade Information System (SICE)
- Trade unit providing documention and links about agreements on trade in the Western Hemisphere.
- http://www.sice.oas.org/

Summit of the Americas Information Network
- A consultation process, including meetings of heads of state, to seek solutions to problems shared by all the countries in the Western Hemisphere.
- http://www.summit-americas.org/

Inter-American Telecommunication Commission (CITEL)
- Advising and decision-making on communications development and regulation.
- http://www.citel.oas.org/