Lumino is a municipality in the district of Bellinzona in the canton of Ticino in Switzerland .

Lumino is first mentioned in 1168 as locus Lugomini. In German it used to be known as Lugmin. The convenient location at the entrance to the Val Mesolcina and the ancient fortifications in the neighborhood indicate that there was an early settlement. The assets of the Bishop of Como in Lumino were given to Capitanei of Locarno in the 12th century. It is listed as part of the County of Bellinzona in 1335.