Saint-Leu-la-Forêt (French pronunciation: [sɛ̃ lø la fɔʁɛ] ⓘ) is a commune in the Val-d'Oise department, in the northwestern outer suburbs of Paris, France.

It is located 19.9 km (12.4 mi) from the centre of Paris.

In 1821, the commune of Saint-Leu-Taverny was demerged.

Thus, Saint-Leu-la-Forêt and Taverny were both restored as separate communes.

Saint-Leu-la-Forêt is served by Saint-Leu-la-Forêt station on the Transilien Paris-Nord suburban rail line.