Onsernone is a municipality in the Swiss canton of Ticino, near the city of
Locarno 
. The river
Isorno , known as the Onsernone River in Italy, runs through the valley with which Onsernone shares its name.
The municipality was created in 1995 by a merger of
Comologno ,
Crana and Russo.
On 10 April 2016 the former municipalities of Vergeletto,
Gresso ,
Mosogno and Isorno merged into Onsernone.
History
Comologno is first mentioned in 1438 as Comolognium. Crana is first mentioned in 1228 as Grana and in 1265 it was mentioned as Crana.
Determining current location...