Kem Nunn (born 1948) is an American fiction novelist, surfer, magazine and television writer from California. His novels have been described as "surf-noir" for their dark themes, political overtones and surf settings. He is the author of five novels, including his seminal surf novel Tapping the Source. He received an MFA in Creative Writing from UC Irvine.
He has collaborated with producer David Milch on the HBO Western drama series Deadwood. Milch and Nunn co-created the HBO series John from Cincinnati, a surfing series set in Imperial Beach, California which premiered on June 10, 2007. He has also written for season 5 of Sons of Anarchy.