Crépy-en-Valois is a commune located in the Oise department in northern France. It is located in the Paris Metropolitan Area, 57.8 km (35.9 mi) northeast of the center of Paris.

Oise is a department in the north of France. It is named after the river Oise. Inhabitants of the department are called Oisiens or Isariens, after the Latin name for the river, Isara. It had a population of 829,419 in 2019.