CIA - Chiefs of State and Cabinet Members of Foreign Governments: Tonga
- List of government officials and their titles, updated weekly. Also includes the head of the central bank, ambassadors to the United States and Permanent Representatives to the UN, New York.
- https://www.cia.gov/library/publications/world-leaders-1/world-leaders-t/tonga.html

World Statesmen - Tonga
- Review of the country's history, politics, leaders and international organizations and treaties. Includes map, constitution, national anthem and pictures of historical flags.
- http://www.worldstatesmen.org/Tonga.html

World Legal Information Institute - Tonga
- Catalog and search facilities for over 500 databases from 55 countries including case-law, legislation, treaties, law reform reports, law journals, and other materials.
- http://www.worldlii.org/catalog/2136.html

US Law Library of Congress - Tonga
- Annotated compendium of online sources providing access to primary documents, legal commentary and general government information about specific jurisdictions and topics.
- http://www.loc.gov/law/guide/tonga.html

Land Forces of Britain, the Empire and Commonwealth - Tonga
- Comprehensive catalog of web resources pertaining to land forces and military history.
- http://www.regiments.org/nations/oceania/tonga.htm

Governments on the WWW - Tonga
- Directory of government and political web sites.
- http://www.gksoft.com/govt/en/to.html

IFES - Election Guide: Tonga
- Includes government overview, elections, news and links.
- http://www.electionguide.org/country.php?ID=215

Ministry of Civil Aviation
- Provides air traffic control and meteorological information.
- http://www.mca.gov.to/

Government of Tonga
- Provides department information, tourism links and photo gallery.
- http://pmo.gov.to/