Herman and Katnip are a duo of cartoon characters (Herman the mouse and Katnip the cat), who have appeared both separately and together in Famous Studios cartoons from 1943 to 1959. Their cartoons series together is essentially a clone of MGM's Tom and Jerry.

Herman and Katnip and the other original Famous characters were purchased by Harvey Comics in 1958, who continued to promote the characters under the name Harveytoons.