Sessera Valley (in Italian Valle Sessera) is a valley in north-east of Piedmont in the Province of Biella, Italy.

The valley takes its name from the river Sessera, a right-hand tributary of the Sesia which flows through the valley.

The municipalities of the lowest part of the valley are Ailoche, Caprile, Coggiola, Crevacuore, Guardabosone, Pray and Portula.

[1] Its highest part is used as pasture and administratively is divided in several exclaves belonging to the municipalities of the central part of the Province of Biella.

[2] Among the notable summits which surround the valley (al belonging to the Biellese Alps) there are: The highest part of the valley and some surrounding areas are included in a SIC (Site of Community Importance) of 10,786.73 ha called Val Sessera (code IT1130002).