Its municipal borders enclose an area of  ranging in elevation from  above sea level. The commune borders Gabiano to the north, Mombello Monferrato to the east, Castelletto Merli and Odalengo Piccolo to the south, and Odalengo Grande and Villamiroglio to the west. The two principal population centres are Valle Cerrina which had a population of 583 at the time of the 2001 census, and Cerrina itself, the historic centre and capoluogo which had a population of 353.
The municipality's boundaries encompass an area spanning elevations ranging from above sea level. The commune borders Gabiano to the north, Mombello Monferrato to the east, Castelletto Merli and Odalengo Piccolo to the south, and Odalengo Grande and Villamiroglio to the west. The two main population centers are Valle Cerrina with a population of 583 at the time of the 2001 census, and Cerrina itself, the historic center and administrative seat which had a population of 353.