Phyllis Nagy (/nɑːʒ/ NAHZH;[1] born November 7, 1962) is an American theatre and film director, screenwriter and playwright.

In 2006, Nagy was nominated for the Primetime Emmy Award for writing and directing Mrs. Harris (2005), her screen debut.

In 2016, Nagy received an Academy Award nomination, among numerous other accolades, for Best Adapted Screenplay for the 2015 film Carol.

In February 1999, Disappeared was presented at the Steppenwolf Theatre Company, Chicago by RoadWorks Productions.

Her version of Anton Chekhov's The Seagull was produced at Chichester Festival Theatre in the summer of 2003.