Ben Kilpatrick (January 5, 1874 – March 12, 1912) was an American outlaw during the closing years of the American Old West. He was a member of the Wild Bunch gang led by Butch Cassidy and Elzy Lay. He was arrested for robbery and served about 10 years of his 15-year sentence. Upon his release from prison, he returned to crime and was killed by a hostage during a train robbery.