Aubin-Louis Millin de Grandmaison (19 July 1759 (Paris) – 14 August 1818 Paris) was an antiquary and naturalist erudite in various domains, who succeeded Jean-Jacques Barthélemy as curator of the Cabinet des médailles et antiques of the former French royal library and took an interest in medieval art, which was just beginning to attract serious attention, as well as classical culture.
At the end of a year's term, he was freed following the Thermidorian Reaction, to teach archeology at the nationalised royal library, reestablished as the Bibliothèque nationale; there he also served as conservateur-professeur in the department of antiquities and in 1799-1800 as president of the Conservatoire de la Bibliothèque nationale de France.
As a naturalist he joined Pierre Marie Auguste Broussonet (1761–1807) and Louis-Augustin Bosc d'Antic (1759–1828) to form the first Linnean society in the world, the Société linnéenne de Paris.
From 1807 to 1811, appeared the four volumes of his Voyage dans les départemens du Midi de la France, accompanied by an atlas.
He translated numerous accounts of voyages, edited two dissertations of Carl von Linné for the Société philomathique de Paris and one by Johan Christian Fabricius (1745–1808).