Robert Dreyfus (13 March 1873 - 17 June 1939) was a French writer and journalist who wrote for Le Figaro. During World War I, between January 1916 and February 1919, he was employed in the Ministry of Foreign Affairs, working in the ministry's "diplomatic information service" where he compiled a valuable body of documentation concerning the workings of the Austro-Hungarian empire. His contributions earned him a knighthood in 1920.