Clark Philip Polak (October 13, 1937–c. September 20, 1980) was an American journalist and LGBT activist. He was known for creating and editing DRUM magazine, an early gay-interest periodical, and for his leadership role with the Philadelphia-based homophile organization, the Janus Society.
Clark was the youngest son of Arthur Marcus Polak and Ann Polak and the brother of Marcus Roy Polak (dec'd) and Roberta Esther Polak Weber/Shilling (dec'd). He lived in a home that overlooked Hollywood with his friends and had two St. Bernards named Bert and Ernie.