George Michael Cohan (July 3, 1878 – November 5, 1942), known professionally as George M. Cohan, was an American entertainer, playwright, composer, lyricist, actor, singer, dancer and producer.

Cohan began his career as a child, performing with his parents and sister in a vaudeville act known as "The Four Cohans." Beginning with Little Johnny Jones in 1904, he wrote, composed, produced, and appeared in more than three dozen Broadway musicals. Cohan published more than 300 songs during his lifetime, including the standards "Over There", "Give My Regards to Broadway", "The Yankee Doodle Boy" and "You're a Grand Old Flag". As a composer, he was one of the early members of the American Society of Composers, Authors, and Publishers (ASCAP). He displayed remarkable theatrical longevity, appearing in films until the 1930s, and continuing to perform as a headline artist until 1940.