Jack Harper
Jack Harper may refer to:
- Jack Harper (1900s pitcher) (1878–1950), pitcher in Major League Baseball
- Jack Harper (1915 pitcher) (1893–1927), American pitcher in Major League Baseball
- Jack Harper (American football) (born 1944), former American college and professional football player
Fictional characters
- Jack Harper (Tru Calling), a character in the television series Tru Calling
- Jack Harper, real name of the Illusive Man in the Mass Effect video game series
- On the Buses, a British sitcom broadcast from 1969 to 1973, which included a character named Jack Harper