McGrew Willis (August 18, 1891 – October 13, 1957) was an American screenwriter of the silent and early sound film eras.
Born Frank McGrew Willis on August 18, 1891, in Pleasanton, Iowa, he broke into the film industry writing film shorts in 1914 and 1915 as a freelance screenwriter.
His first feature credit came in 1915, with The Quest, the first of three features he would pen in 1915.