Trarego Viggiona is a comune (municipality) in the Province of Verbano-Cusio-Ossola in the Italian region Piedmont, located about northeast of Turin and about north of Verbania. As of 31 December 2004, it had a population of 375 and an area of .
The municipality of Trarego Viggiona contains the frazioni (subdivisions, mainly villages and hamlets) Viggiona and Cheglio.
Trarego Viggiona borders the following municipalities: Aurano, Cannero Riviera, Cannobio, Oggebbio, Valle Cannobina.