Léopold Flameng (22 November 1831, Brussels – 5 September 1911, Courgent) was a French engraver, illustrator and painter. He was born of French parents. His first artistic studies were with Luigi Calamatta and Jean Gigoux. His skill as engraver was noticed by Charles Blanc and his collaboration in the Gazette des Beaux-Arts with fellow engraver Léon Gaucherel helped ensure the publication’s reputation. He eventually provided one hundred illustrations. He was a medallist at the Exposition Universelle (1878) and was elected a member of the Académie des Beaux-Arts in 1898 .
Known for his etchings of works by Jan van Eyck, Leonardo da Vinci, Rembrandt, Ingres and Delacroix, he illustrated several books on Paris and numerous literary works of classical and contemporary authors, including Boccaccio, Paul Scarron, Victor Hugo and François Coppée. He had numerous students, including his son, François Flameng as well as Richard Geiger (1870–1945), Frederic-Auguste Laguillermie (1841–1934) and Paul Adolphe Rajon.