Comologno is a village and former municipality in the district of Locarno in the canton of Ticino , Switzerland .

In 1995 the municipality was merged with the other, neighboring municipalities Crana and Russo to form a new and larger municipality Onsernone .

The municipality also contained the villages Vocaglia, Corbella, Cappellino and Spruga .

Comologno is first mentioned in 1438 as Comolognium.

During the Ancien Régime, Comologno belonged to the Squadra of Crana, which together with the other villages of the valley (with the exception of Auressio ) formed the medieval municipality of Onsernone. With the establishment of the Canton of Ticino in 1803, Comologno became an independent municipality.