Viganella is a frazione of Borgomezzavalle, a comune (municipality) in the Province of Verbano-Cusio-Ossola in the Italian region Piedmont, located about 120 kilometres (75 mi) northeast of Turin and about 30 kilometres (19 mi) northwest of Verbania. It was a separate comune until 2016, when it was merged with Seppiana into the municipality of Borgomezzavalle.