Fes or Fez (Arabic فاس [Fās], French Fès) is the fourth largest city in Morocco, after Casablanca, Rabat, and Marrakech, with a population of 946,815 (2004 census). It is the capital of the Fès-Boulemane Region.

Fes is one of the four so-called "imperial cities" (the others are Marrakech, Meknes and Rabat). It is separated into three parts, Fes el Bali (the old, walled city), Fes-Jdid (new Fes, home of the Mellah), and the Ville Nouvelle (the French-created, newest section of Fes). The Medina of Fes el Bali, the largest of the two medinas of Fes, is believed to be the largest contiguous car-free urban area in the world. Fes el Bali is classified as a UNESCO World Heritage Site.