| Pat Harrington Sr. | |
| Birth Name: | Daniel Patrick Harrington |
| Birth Date: | 6 February 1901 |
| Birth Place: | Montreal, Quebec, Canada |
| Death Place: | New York City, New York, U.S. |
| Occupation: | Actor |
| Children: | Pat Harrington Jr. |
Daniel Patrick Harrington Sr. (February 6, 1901 - September 2, 1965) was a Canadian actor.
Born Daniel Patrick Harrington in Montreal, Quebec, he made his Broadway debut in Panama Hattie in 1940. Additional Broadway credits included the patriotic revue Star and Garter (1942), The Front Page (1946), Call Me Madam (1950) and Sunday in New York (1961). He also appeared on the early television series A Couple of Joes (1949) and Wonderful John Acton (1953).
He was the father of actor Pat Harrington Jr.