Martin Archer Flavin was an American playwright and novelist. His novel Journey in the Dark received both the Harper Prize for 1943 and a Pulitzer Prize for 1944. His play The Criminal Code was produced on Broadway in 1929, and it was the basis for the movie The Criminal Code. In all, he had eleven plays on Broadway between 1923 and 1937.

The Criminal Code is a 1930 American pre-Code romantic crime drama film directed by Howard Hawks and starring Walter Huston and Phillips Holmes. The screenplay, based on a 1929 play of the same name by Martin Flavin, was written by Fred Niblo Jr. and Seton I. Miller, who were nominated for Best Adaptation at the 4th Academy Awards but the award went to Howard Estabrook for Cimarron.