Frank McGlynn senior (* 26. Oktober 1866 in San Francisco, Kalifornien; † 18. Mai 1951 in Newburgh, New York) war ein US-amerikanischer Schauspieler. ()
Gaunt-looking American character actor Frank McGlynn Sr. is best remembered for his many portrayals in 1930s and 1940s historical films of US President Abraham Lincoln. McGlynn began performing on stage in 1896. Prior to that, he had been a practicing lawyer, a graduate of the University of California, Hastings College of the Law.