Santuyanu is one of 28 parishes (administrative divisions) in Salas, a municipality within the province and autonomous community of Asturias, in northern Spain.
It is 4.55 km2 (1.76 sq mi) in size, with a population of 38.
43°26′00″N 6°12′00″W / 43.433333°N 6.2°W / 43.433333; -6.2