Naomi Gyllenhaal (née Achs) is an American screenwriter. She has written the screenplays for several feature films, including Running on Empty (for which she received an Academy Award nomination for Best Original Screenplay and won a Golden Globe Award for the same category), Losing Isaiah, and most recently Bee Season. She is the Naomi from the Love of Chair segment of The Electric Company, where she was an associate producer for two seasons.

She was raised in a family of "high-achieving New York Jews." She attended Barnard College, an affiliate of Columbia University, in New York City, graduating with a BA in English. She later achieved an MA in Developmental Psychology at Columbia.

Her second ex-husband is the film director Stephen Gyllenhaal, with whom she has also collaborated professionally. They were married for 32 years. The couple's two children are actors Maggie and Jake. Her first ex-husband is historian and Columbia Professor Eric Foner.

On October 3, 2006, Naomi became a grandmother for the first time when Maggie and her husband, actor Peter Sarsgaard, became parents of baby Ramona Sarsgaard, who was born in New York City.