Thomas or Tom Horn may refer to:
Tom Horn (1860–1903), American scout, cowboy, soldier, range detective, and Pinkerton agent Tom Horn (film), 1980 Western film Thomas E. Horn, president of the San Francisco War Memorial and Performing Arts Center Thomas Horn (actor) (born 1997), American attorney and former actor
See also Thomas Horne (disambiguation) Tom Horne (born 1945), Canadian-American attorney and politician