Louis Mann (20 April 1865 – 15 February 1931) was an American theatre actor and sometime director, who in his later life made a few appearances in motion pictures.

In 1896 he appeared in the Herald Square Theatre on Broadway, in the George Dance and Ivan Caryll production The Girl from Paris.

[4] Mann continued appearing in original stage comedies, and in 1903 produced his own Broadway production, Charles Nirdlinger's The Consul at the Princess Theatre on 29th Street.

[6] In 1906, Mann appeared in his wife's play Julie Bonbon, which opened at Lew M. Field Theatre, New York.

In 1918 Mann appeared in his most notable role, that of Karl Pfeifer, in Aaron Hoffman's stage play Friendly Enemies.