William Surrey Hart, born December 6, 1864 in Newburgh, New York, United States – died June 23, 1946 in Newhall, California was a silent film actor, screenwriter, director, and producer.

A successful Shakespearian actor on Broadway, William S. Hart went on to become one of the first great stars of the motion picture Western. Hart appeared in director Sidney Olcott's 1907 production of Ben Hur for which he received good recognition and more parts in short films until 1914 when he starred in his first feature, The Bargain .

In 1917, he accepted a lucrative offer from Adolph Zukor to join Famous Players-Laskey. He made his last film in 1925 for United Artists and retired to a ranch in Newhall, California.

Hart was facinated by the Old West. He acquired Billy the Kid's "six shooters," and was a friend of legendary lawmen Wyatt Earp and Bat Masterson.

On his passing in 1946, William S. Hart was buried in Green-Wood Cemetery in Brooklyn, New York.

As part of the Natural History Museum of Los Angeles County, California, Hart's former home and 260 acre ranch on Sunset Boulevard in Newhall is now "William S. Hart Park." As well, the William S. Hart Union High School District located in the Santa Clarita Valley in the northern part of Los Angeles County was named in his honor.