Debora Cahn is an American writer and producer of television and film. She was a writer and executive producer on the Showtime series Homeland for its final two seasons (2018–2020), and creator, executive producer and showrunner on the Netflix political thriller series The Diplomat. Cahn has won two Writers Guild of America Awards and has received multiple nominations.

Cahn graduated from Barnard College of Columbia University, and received a master's degree in acting from the Institute for Advanced Theater Training at Harvard University. Her father was a nuclear physicist, and her mother was a clinical psychologist.

Cahn began her career as a writer and producer on The West Wing from its fourth to seventh and final season (2002–2006).^{[citation needed]} From 2006 to 2013, she was a writer and producer of Grey’s Anatomy.^{[citation needed]}

She was a writer and co-executive producer for Martin Scorsese's HBO series Vinyl (2016).^{[citation needed]}

In 2018, she wrote the HBO film Paterno, starring Al Pacino and directed by Barry Levinson. She was a writer and executive producer on the Showtime series Homeland for its final two seasons (2018–2020).^{[citation needed]}

She was also a writer and consulting producer on FX's Fosse/Verdon (2019), for which she won a Writers Guild of America Award for Best Adapted Long Form Television.^{[citation needed]}

In 2022, Cahn signed a multi-year overall deal with Netflix. Under the deal, she is serving as executive producer and showrunner on the political thriller drama series The Diplomat.

Cahn's production company is Let's Not Turn This Into a Whole Big Production.^{[citation needed]}