Peter Croes (born March 16, 1984) is a triathlete from Belgium, specialized in the Olympic distance.

Born in Bonheiden, Croes started out his sporting career as a football player in his early childhood, until he discovered triathlon at age twelve in a local school.

[2] His first major success happened when he came third at the 2001 European Junior Triathlon Championships in Karlovy Vary, Czech Republic, followed by his winning triumphs at the same event twice, in 2002 and in 2003.

Because of his repeated successes in the championships, Croes eventually made his international debut in triathlon for the ITU World Cup in Madrid, where he finished fifth.

Croes was also selected for the national team, together with his teammate Axel Zeebroek, at the 2008 Summer Olympics in Beijing.