François-Xavier Gillot (12 September 1842, Autun – 8 October 1910, Autun) was a French physician, mycologist and botanist.
Gillot was a founding member of the Société d'histoire naturelle d'Autun, and from 1877 was a non-resident member of the Société botanique de Lyon.
The fungal genus Gillotia was named in his honor by Pier Andrea Saccardo and Alessandro Trotter.