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.A legal challenge to the merger was raised by Aquila, but was rejected by the Federal Court on 18 April 2006.