Tony Marsh (born 12 August 1972 in Rotorua) is a New Zealand-born former rugby union player who has represented France playing at centre.
He is one of the only players who won back-to-back Super Rugby titles with different teams.
Later that year he left New Zealand for France and signed for Top 12 club Montferrand, now known as Clermont, with whom he reached the final of the league on three occasions, in 1999, 2001 and 2007, won the European Challenge Cup twice in 1999 and in 2007, as well as the now-defunct French national cup in 2001.
After three years in France he became eligible to play for les Bleus and Bernard Laporte named him in the French squad in 2001.
Early in 2003 he was diagnosed with testicular cancer but overcame the disease after grueling months of chemotherapy sessions and rejoined the French team, reaching the semi-final stage of the 2003 Rugby World Cup.