Louis Ducis (14 July 1775, Versailles - 2 March 1847, Paris) was a French painter and student of Jacques-Louis David.
Louis Ducis was instructed by David, whom he partly imitated in his historical pieces, besides which he devoted himself also to genre and portrait painting. His 'Mary Stuart' and 'The Début of Talma' were formerly in the Luxembourg Gallery. He died in 1847.