Chilcayoc (possibly from Quechua ch'illka baccharis, -yuq a suffix to indicate possession, the one that has got baccharis or the one with baccharis) is a volcano in the Andes of Peru, about 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.