Rex Motion Picture Company was an early film production company in the United States.

After Edwin S. Porter's short-lived Defender Film Company failed, The Rex Motion Picture Company was established by Edwin S. Porter, Joseph Engel, and William Swanson.^[1] Rex, based at 573–579 11th Avenue, New York City.^[2] produced dozens of films from 1910 into 1917.^[3] It adopted a crown emblem.^{[citation needed]}

Lois Weber established herself in the film industry at Rex.

Rex acquired Gem Motion Picture Company film properties and released them in 1912 under its own banner and later Universal's.^{[citation needed]} Rex was one of the studios that combined to form Universal Pictures under Carl Laemmle's leadership.^{[citation needed]}

• By the Light of the Moon (film) (1911)
• The Vagabond (1911), a drama
• Sherlock Holmes, Jr. (1911)
• Her Way (1911)
• The Artist Financier (1911), a drama
• The White Red Man (1911), drama
• The Colonel's Daughter (1911), a drama^[4]
• Castles in the Air (1911)^[5] a comedy
• Leaves in the Storm (1912), extant
• The Fine Feathers (1912), extant
• A Japanese Idyll (1912), extant
• The Honor of the Family (1912), lost
• Suspense, extant
• Symphony of Souls^[6] (1914)
• The Heart of the Hills (1914)
• Alas and Alack (1915), partial print is extant
• All for Peggy (1915), lost
• The Stronger Mind (1915), lost
• Cross Purposes (1916)
• Unmasked (1917)