Cap Corse, a geographical area of Corsica (Corse in French), is a 25-mile (40 km) long peninsula located at the northern tip of the island. At the base of it is the second largest city in Corsica, Bastia. Cap Corse is also a Communauté de communes comprising 18 communes.

Starting on the west side and working north around the peninsula the communes are:

Numerous historians have termed Cap Corse "the Sacred Promontory" and have gone so far as to suppose the name came from a high concentration of early Christian settlements. This is a folk-etymology.

The term comes from the geographer Ptolemy, who called his first and northernmost location on Corisca the hieron achron in ancient Greek, transliterated by the Romans to sacrum promontorium. This is not the only point of land to be so-called; there were many others in the classical world, none of them Christian. The meaning is somewhat ambiguous, whether it was called that because of a temple placed there or whether as the end of the land it was sacred to the god of the sea. If the date of the Geography is taken arbitrarily to be 100 AD, and Ptolemy was working from earlier sources, a Christian association is highly unlikely. There is no evidence that Corsica was converted earlier than the 6th century AD, no evidence of any Christian communities in the area in Ptolemy's time, and the concentration of later Christian edifices is no greater than they are in any populated region of Corsica.