Blenio is a municipality of the district of Blenio, in the canton of Ticino, Switzerland.
Blenio was created on 22 October 2006 when it incorporated the formerly autonomous municipalities of Aquila, Campo Blenio, Ghirone, Olivone and Torre of the upper Blenio valley.
The Blenio Valley (Italian: Valle di Blenio) is a valley of the Lepontine Alps in the Swiss canton of Ticino. The valley contains the river Brenno. The upper valley, between Lai da Sontga Maria and Olivone, is named Valle Santa Maria.
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