Maurice Leloir (1 November 1853 – 7 October 1940) was a French illustrator, watercolourist, draftsman, printmaker, writer and collector.

In 1907, he was the founding president of the Société de l'histoire du costume, and he donated the family's collection of fashion prints to the society.

[2] Around the 1890s, Leloir and his students flooded the picture book market, inspired by photographs representing accurately costumes and attitudes of the past, much appreciated by bibliophiles.

He was a prolific illustrator of books, especially for children, such as the Richelieu by Théodore Cahu [fr], of magazines and fans.

In 1929, Leloir traveled to Hollywood at the urging of Douglas Fairbanks to work on his last silent film, The Iron Mask.