Chilcayoc is a volcano in the Andes of Peru, about 3347m high. It is situated in the "Valley of the Volcanoes" in the Arequipa Region, Castilla Province, Andagua District. Chilcayoc lies west of the Chachas Lake and north of the volcano Jechapita.South-east of Chilcayoc and Jechapita there is another volcano named Chilcayoc Grande which is 3243m high.