The Comune di Lenno was united to Mezzegra, Ossuccio and Tremezzo to form a single municipality named Comune di Tremezzina: the new administration was formalized after election of the Mayor on 25 May 2014.
The Comune di Lenno joined with Mezzegra, Ossuccio, and Tremezzo to form a unified municipality named Comune di Tremezzina: the newly formed government began operating following the election of the Mayor on May 25th, 2014.