Jean-Claude Nallet (born 13 March 1947) is a retired French sprinter.
He competed at the 1968 Summer Olympics in the 400 m and 4 × 400 m relay and at the 1976 Summer Olympics in the 400 m hurdles and reached the final in the relay.
He won two gold and two silver medals in these events at the European championships of 1969-1974.
Nallet retired after finishing sixth in the 400 m hurdles at the 1978 European Athletics Championships.
He is married to French Olympic gymnast Chantal Seggiaro.