The history of the Municipality of Val Brembilla begins on February 4, 2014. The new municipality was established by Regional Law no. 3 of 30 January 2014, through the merger of the municipalities of Brembilla and Gerosa and following the favourable result obtained in the two municipalities of the consultative referendum held on 1 December 2013.
The history of the municipalities of Brembilla and Gerosa has its roots in the centuries. The municipality covers an area of 31,44 square kilometres (21 square kilometres former municipality of Brembilla, 10,44 square kilometres former municipality of Gerosa), including almost the entire Val Brembilla. It borders the municipalities of Sedrina, Ubiale Clanezzo, Capizzone, Zogno, San Pellegrino Terme, Blello, Taleggio, Berbenno, Corna Imagna, Capizzone, San Giovanni Bianco, Sant'Omobono Terme.