Jack Moffitt (May 8, 1901 – December 4, 1969), also credited at John C. Moffitt, was an American screenwriter and film critic. Employed by Universal Studios in the 1930s, he wrote screenplays for a number of minor films. Over the years he wrote film reviews for The Kansas City Star, Esquire, and The Hollywood Reporter. He was an ardent anti-Communist, who contributed to the Hollywood blacklist by testifying against others in the film industry for the 1947 House Un-American Activities Committee.