- (AU) Triathlon ACT
 - Calendars, results, news, and links about triathlon. - (AU) Triathlon Australia
- Governing body. Includes press releases, athlete information, and links.
- (AU) Triathlon NSW
- (AU) Triathlon Western Australia
- Columbia Triathlon Association
- Hong Kong Triathlon Association (HKTriA)
- With news, events, and training courses.
- International Triathlon Union (1)
- Pan-American Triathlon Confederation
- Switzerland Triathlon Federation
- Triathlantic Association
- Promotes triathlons and biathlons throughout the east coast of the United States.
- Triathlon Canada
- National federation for the sport of triathlon and duathlon in Canada. Includes information on the national teams, resources, news, and events.
- USA Triathlon
- Featuring articles, rankings, and an event calendar by triathletes for triathletes.
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