Carl Harbaugh was an American film actor, screenwriter and director.

Regeneration is a 1915 American silent biographical crime drama co-written and directed by Raoul Walsh. The film, which was the first full-length feature film directed by Walsh, stars Rockliffe Fellowes and Anna Q. Nilsson and was adapted for the screen by Carl Harbaugh and Walsh from the 1903 memoir My Mamie Rose, by Owen Frawley Kildare and the adapted 1908 play by Kildare and Walter C. Hackett.