Nathalie Simon-Chevallier (; born 14 April 1962) is a French former athlete, who specialised in the 400 metres.
Champion of France 400 meters in she was seventh in the 4 ÃÂ 400 m relay at the 1987 World Championships, at Rome. She participated in the following year in the 1988 Seoul Olympics. Eliminated in the 400m heats, she took seventh in the 4 ÃÂ 400 m relay.
In 1987, she won the gold medal in the 400m at Mediterranean Games at Latakia, Syria.