The British Triathlon Federation is the national governing body for the sport of Triathlon in Great Britain.

The British Triathlon Federation sanctions over 400 events every year, has over 300 affiliated clubs and over 8500 members through the Home Nations of Triathlon England triathlonscotland and Welsh Triathlon. You can join your Home Nation today online or via phone, fax or post. The benefits of Home Nation membership includes a reduced entry fee to Home Nation sanctioned events, worldwide public liability insurance cover, personal accident cover, free legal claims service, bimonthly copies of TriNews, access to the members-only section of the Briiths Triathlon website as well as a British Triathlon Federation handbook and car sticker.