Nadine Debois (born 25 September 1961)^[1] is a French athlete specialising in the 400 metres and combined events. She is the world record holder for the fastest 800 metres ever run in a heptathlon.

Nadine Debois was the first holder of the French record in the heptathlon in 1981 with 5,537 points. She improved this record in 1986 with 6,333 points.

In 1987, she was part of the French women's 4 × 400 m relay that placed seventh during the 1987 World Championships in Athletics in Rome. French national team with Debois finished with the same result in this discipline at the 1988 Olympic Games in Seoul.^[1]

She won five French championship titles: two outdoors in the long jump and heptathlon, and three in the indoor 400 metres and pentathlon.^[1]