Otto Crusius (December 20, 1857–December 29, 1918) was a German classical scholar. He was born in Hanover and died in Munich. He became professor at the University of Heidelberg in 1898 and at Munich in 1903. His works include: Zur griechischen Religionsgeschichte (1886), Untersuchungen zu Herondas (1892), etc. He edited Philologus; Herondas (1901); Fabeln des Babrius (1897); and Griechische Lyriker (1897 et seq). After 1909 he published, with others, several volumes of Das Erbe der Alter: Schriften über Wesen und Wirkung der Antike (Leipzig).