Harl Vincent (October 19, 1893–May 5, 1968) was the pen name of Harold Vincent Schoepflin, an American mechanical engineer and science fiction writer. He was part of the first generation of writers to appear regularly in the pulp science fiction magazines, publishing his first story, “The Golden Girl of Munan”, in the June 1928 issue of Amazing Stories. Vincent was born in Buffalo, New York in 1893. He married Ruth Hoff, and they had two children, a son and a daughter. Vincent worked as a mechanical engineer for Westinghouse, specializing in the installation and testing of large electrical apparatus. Later he was employed as a sales engineer. Vincent’s writing career began after he began reading Hugo Gernsback’s pioneering science fiction magazine Amazing Stories. Vincent’s first published story, “The Golden Girl of Munan”, appeared in the June 1928 issue of Amazing. Over the next fourteen years, Vincent published over seventy science fiction stories. Although most of his work appeared in the early science fiction magazines, he appeared twice in the general fiction pulp magazine Argosy. Although he ceased writing in the early 1940s, Vincent remained involved in science fiction. After moving to Los Angeles, Vincent joined the Los Angeles Science Fantasy Society and the Count Dracula Society, as well as attending local science fiction conventions. Vincent resumed writing late in life, publishing the novel The Doomsday Planet in 1966 and the story “Invader” in the September 1967 issue of If. Vincent died in Los Angeles on May 5, 1968 of emphysema and pneumonia complications.