Vergnaud is a surname. Notable people with the surname include:
- Bernadette Vergnaud (born 1950), French politician
- Gérard Vergnaud (1933–2021), French mathematician, philosopher, educator, and psychologist
- Loïc Vergnaud (born 1978), French para-cyclist
- Cyril R. Vergnaud (born 1972), French educator, poet, writer
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