Triathlon at the 2008 Summer Olympics – Qualification
Eight National Olympic Committees could have a maximum of three eligible athletes per event, all other NOCs could have a maximum of two eligible athletes per event. Here follows the detailed attribution of the qualification places:
| Event | Date | Location | Men | Women |
| Pan American Continental Olympic Qualifier | July 14, 2007 |  Rio de Janeiro |  Andy Potts | Julie Ertel |
| African Continental Olympic Qualifier | March 8, 2008 |  Hammamet |  Hendrik De Villiers | Mari Rabie |
| Oceania Continental Olympic Qualifier | March 9, 2008 |  Wellington | Shane Reed |  Emma Moffatt |
| Asian Continental Olympic Qualifier | May 3, 2008 |  Guanzhou |  Ryosuke Yamamoto | Ai Ueda |
| European Continental Olympic Qualifier | May 10, 2008 |  Lisbon |  Frédéric Belaubre | Vanessa Fernandes |
| 2008 Triathlon World Championships | June 8, 2008 |  Vancouver |  Javier Gómez Bevan Docherty Reto Hug |  Helen Tucker Sarah Haskins Samantha Warriner |
| ITU Olympic Qualification Rankings | June 15, 2008 | N/A | Brad Kahlefeldt Simon Whitfield Kris Gemmell Tim Don Volodymyr Polikarpenko Maik Petzold Jan Frodeno Sven Riederer William Clarke Daniel Unger Alistair Brownlee Tony Moulai Paul Tichelaar Iván Raña Igor Sysoev Alexander Brukhankov Cedric Fleureton Filip Ospalý Jarrod Shoemaker Bruno Pais Matthew Reed Hirokatsu Tayama Olivier Marceu Dmitri Polyansky Courtney Atkinson Brent McMahon Dmitriy Gaag Marek Jaskolka Rasmus Henning Daniel Fontana Reinaldo Colucci Danyl Sapunov Peter Croes Duarte Marques Axel Zeebroek Sander Berk Simon Agoston Marko Albert Dirk Bockel Emilio D'Aquino Juraci Moreira | Emma Snowsill Debbie Tanner Laura Bennett Anja Dittmer Joelle Franzman Hollie Avil Andrea Hewitt Nicola Spirig Lauren Groves Elizabeth May Jessica Harrison Magali di Marco Ricarda Lisk Erin Densham Carole Péon Eva Dollinger Kiyomi Niwata Juri Ide Nadia Cortassa Lisa Nordén Daniela Ryf Kathy Tremblay Kirsten Sweetland Vendula Frintová Ainhoa Murua Irina Abyssova Kate Roberts Mariana Ohata Tania Haiböck Lenka Zemanova Ana Burgos Kate Allen Ewa Dederko Emma Davis Xing Lin Lisa Mensik Wang Hongni Maria Czesnik Yuliya Spunova Olga Zaousailova Charlotte Bonin Zita Szabó Birgitta Berk |
| ITU Continental Rankings | July 15, 2008 | N/A |  Christopher Felgate Eligio Cervantes Daniel Lee Chi Wo Pavel Simko |  Barbara Rivero Diaz Tania Mak So Ning Deniz Dimaki |
| Host nation | N/A | N/A | Zhang Yiming | |
| Tripartite Commission | Jan 31, 2008 | N/A |  Omar Tayara |  Flora Duffy |
| Total | - | - | 55 | 55 |