Olèrdola is a municipality in the comarca of the Alt Penedès in Catalonia, Spain. It is situated on the northern side of the Garraf massif, and the highest point of the municipality is the Puig de l'Àliga at 468 m. Olèrdola castle controlled the area of the Penedès Depression in the Early Middle Ages, reaching the height of its significance when its castle dominated the region under the control of the rebellious Mir Geribert, "Prince of Olèrdola".