Mathieu Tillet (10 November 1714 Bordeaux - 13 December 1791) was a French botanist, agronomist, metallurgist and administrator.
In 1760 and 1761 he traveled around the Angoumois, researching yet another cereal plague together with his friend and fellow agronomist Henri-Louis Duhamel du Monceau.
[1] In 1766 he was charged with the making of 24 copies of the Toise de l'Academie, the official measuring unit of length in the Kingdom of France, and their distribution to the main French cities of the time.
It was during his administration that the Comtesse de la Motte was imprisoned there for her participation in the Affair of the diamond necklace, and escaped.
He was a member of commissions of the Academy of Sciences appointed in 1790 to advise the National Constituent Assembly on a new currency and on new weights and measures.