Léon Gaston Genevier (18 June 1830, Saint-Clément-de-la-Place, near Angers – 11 July 1880, Nantes) was a French pharmacist and botanist. During his career, he was a practicing pharmacist in Mortagne-sur-Sèvre and Nantes. Genevier is best remembered for investigations of the genus Rubus native to the Loire basin. He was an honorary member of the Société d'études scientifiques d'Angers.