Martul is one of four parroquias, a parish (administrative division) in Villanueva de Oscos, a municipality within the province and autonomous community of Asturias, in northern Spain. It is 5.5km (03.4miles) from Villanueva, the capital of the municipality. Situated at 821m (2,694feet) above sea level, it has 9.23km2 area size, with a population of 32 (INE 2011).