Writers Joel Coen and Ethan Coen suffered writer's block while writing Miller's Crossing (1990). They took a three week break and wrote Barton Fink (1991) a film about a writer with writer's block. The name of Tom Regan's residence is "The Barton Arms". In one of the newspapers an article reads 'Seven Dead in Hotel Fire,' another reference to Barton Fink.
Although he was a native Irishman playing a lieutenant to an Irish mobster, the Coens did not originally want Gabriel Byrne to use his own accent in the film. Byrne argued that his dialogue was structured in such a way that it was a good fit for his accent, and after he tried it, the Coens agreed. Ultimately, both Byrne and Albert Finney used Irish accents in the film.
Bernie is referred to as a Schmatte. 'Schmatte' is a Yiddish word for an old rag and was also used colloquially as a label for things of poor quality or anything worthless. Caspar's use is derogatory, labeling Bernie worthless both as a man and as a Jew.
Jon Polito was originally offered the role of Eddie Dane but he campaigned for the part of Johnny Caspar.
Albert Finney: In drag, as the matron dressed in black and white, on Tom's left as Tom enters the ladies restroom.