The municipality is located in the Leventina district, along both sides of the upper Leventina valley. The borders stretch all the way from the peaks above the valley, at an elevation of over , to the valley at . It consists of the village of Quinto and the village sections of Altanca, Ambrì, Catto, Deggio, Piotta and Varenzo. The municipalities of Airolo and Quinto are considering a merger some time in the future into a new municipality which will be known as Airolo-Quinto.