US Olympic Triathlon 2008

- Men's event: August 18, 2008 at 10:00 a.m. China Standard Time (August 17, 2008 at 10:00 p.m EST)
- Women's event: August 19, 2008 at 10:00 a.m. CST (August 18, 2008 at 10:00 p.m. EST)
- Location: Ming Tomb Reservoir, Beijing, China
- Coach: Andy Schmitz

Three men and three women, plus two alternates, represented the United States in the triathlon at the 2008 Summer Olympics in Beijing, China.
The men's competition began at 10:00 a.m. China Standard Time on August 18, 2008, while the women's event started at 10:00 a.m. CST on August 19, 2008. Each competition consists of a 1,500 meter swim, 40 kilometers of cycling and a 10 kilometer run.
The Olympic Triathlon was added to the summer competitions in 2000. Susan Williams won a bronze medal for the United States at the 2004 Summer Olympics in Athens, Greece. The U.S. failed to win a triathlon medal at the 2008 Summer Games. Laura Bennett finished fourth in the women's event, while Hunter Kemper placed seventh in the men's competition.
Team U.S.A
- Laura Bennett
- Julie Ertel
- Hunter Kemper
- Sarah Haskins Kortuem
- Matthew Reed
- Jarrod Shoemaker
- Andy Potts (alternate)
- Becky Lavelle (alternate)