a seaport of northern Spain, in the province of Oviedo; on the Ria de Villaviciosa, an estuary formed by the small river Villaviciosa which here enters the Bay of Biscay. Pop. (1900) 20,995. The town is the headquarters of a large fishery, and has some coasting trade. Its exports are chiefly agricultural produce. Villaviciosa suffers from the competition of the neighbouring ports of Gijon and Aviles, and from the lack of railway communication. It is connected by good roads with Siero (13 m.) and Infiesto (9 m.) on the Oviedo-Infiesto railway.