Martin Block (February 3, 1903 – September 18, 1967) was an influential American disc jockey, widely recognized as the first radio DJ to achieve stardom. Born in Los Angeles, Block began his career in radio by reading commercials at a station in Tijuana, Mexico, before moving to Los Angeles to work as a junior assistant at KFWB. He later moved to New York and joined WNEW in 1934, where he created the iconic "Make Believe Ballroom" show in 1935. This show, which presented recorded music as if it were live from a grand ballroom, became immensely popular and is often credited with initiating the modern disc jockey movement.

Block's innovative style of presenting music in a conversational manner, rather than the authoritative voice common at the time, resonated with audiences. His success with "Make Believe Ballroom" led to national syndication, and he became the first disc jockey to gain national recognition and wealth. Block was known for his persuasive advertising skills, creating memorable slogans like "ABC-Always Buy Chesterfield" and "LSMFT-Lucky Strike Means Fine Tobacco."

Throughout his career, Block worked with major networks such as NBC, ABC, the Mutual Broadcasting System, and the Voice of America. He left "Make Believe Ballroom" in 1954 to host "The Martin Block Show" for ABC Radio and continued to work in radio until his death in 1967. In 1988, Martin Block was posthumously inducted into the Radio Hall of Fame, cementing his legacy as a pioneer of the disc jockey profession.