Sébastienne Marie Henriette Guyot (26 April 1896 – 21 August 1941) was a French engineer who specialized in aerodynamic flying. She was born in Pont l'Abbé in the Finistère. A teacher, Guyot resigned in 1917 to prepare for the competition of the Ecole Centrale of the Paris Lycée Jules-Ferry when she learned that the school would accept girls into its ranks. She graduated in 1921 from the first class of Central School of Paris to accept women. She ranked 45th of 243 graduates (425 students were received in the contest).