John Halliday (September 14, 1880 – October 17, 1947) was an American actor of stage and screen, who often played suave aristocrats and foreigners.

In 1905 Halliday, a civil/mining engineer from before his South Africa adventure, migrated to Nevada and dug up a fortune in gold nuggets and managed to lose the lot.

He progressed from that group to touring the world as leading man in a troupe headed by T. Daniel Frawley.

[2] Making his Broadway debut in 1912 in Cecil Raleigh and Henry Hamilton's The Whip, he became a familiar presence there, especially in sophisticated comedies such as W. Somerset Maugham's The Circle (1921), Vincent Lawrence's Sour Grapes (1926), Louis Verneuil's Jealousy (1928) and S. N. Behrman's Rain from Heaven (1934).

In 1912, Halliday's wife, Camille Personi, sued May Buckley for alienation of affections.