Ronald Jack Pennick (December 7, 1895 – August 16, 1964) was an American film actor. After working as a gold miner as a young man, serving as a US Marine, he would go on to appear in more than 140 films between 1926 and 1962. Pennick was a leading member to in the informal John Ford Stock Company, appearing in dozens of the director's films. Pennick also drilled the military extras in John Wayne's The Alamo (1960).