Jack J. Clark (September 23, 1879 – April 12, 1947) was an American director and actor of the early motion picture industry.

He was persuaded to enter motion pictures in 1907 by Sidney Olcott of the New York-based Kalem Studios during the silent film era.

While in the Holy Land, Kalem Studios produced the first passion play, From the Manger to the Cross, casting Jack Clark as John the Apostle.

About the same time he staged a pageant, Charity, with a cast of 600 persons, which established new records at the Philadelphia Metropolitan Opera House.

He acted in more than 200 films[3] including The Colleen Bawn (1911),[4] From the Manger to the Cross (1912),[5] The Shaughraun (1912),[6] The Last of the Mafia (1915), A Fool's Paradise (1916), Audrey (1916), Pajamas (1927), Love and Learn (1928), and Broadway Howdy (1929).