Donald Gallaher (June 25, 1895 – August 14, 1961) was an American actor.
Gallaher was born in Quincy, Illinois. After moving to New York City as a child with his mother, he began acting in productions such as A Royal Family.
He also appeared in the 1903 silent film The Great Train Robbery. In 1923, he co-starred with Louis Wolheim and Una Merkel in the two-reeler Love's Old Sweet Song filmed in Lee De Forest's Phonofilm sound-on-film process.
Later in life, he produced Broadway plays and directed films, including Temple Tower (1930), June First (1931), and The Hot Spot (1931). In 1949, using the name Don Gallagher, he served as narrator of the ABC Television Players, a short-lived dramatic anthology series broadcast from Chicago.