Serge Joncour (born 1961) is a French novelist and screenwriter. He was born in Paris and studied philosophy at university. His debut novel UV was published in 1998. Notable books include: L'Écrivain national, which won the Prix des Deux Magots; Repose-toi sur moi winner of the Prix Interallié; Chien loup, winner of the Prix Landerneau des Lecteurs, which became the first of his novels to appear in English translation; Nature humaine, winner of Prix Femina 2020.

As a screenwriter, he wrote the script for Elle s'appelait Sarah (2011) starring Kristin Scott Thomas.