卡亚俄 (西班牙语: El Callao) 是秘鲁最大、最重要的港口，与卡亚俄省同域，是卡亚俄大区唯一的省。卡亚俄位于利马(秘鲁首府)的西边，属于利马都会区(Lima Metropolitan Area)的一部分，聚集的人口约占秘鲁的1/3。面积147km²，人口80万。

El Callao (/kɑːˈjaʊ/; Spanish pronunciation: [kaˈʎa.o] or [kaˈʝa.o]) is the chief seaport of Peru. The city is also called Provincia Constitucional (Constitutional Province), the only province of the Callao Region. The Historic Centre of Callao is located 15 km (9.3 mi) west of Historic Centre of Lima , the country's capital, and is part of the Lima Metropolitan Area. Callao borders Lima Province on the north, east and south, and the Pacific Ocean on the west.