The patroness of Cergnago is Sant'Elena Imperatrice (Saint Helena the Empress), celebrated on 18 August; the municipality holds the Chiesa di Sant'Elena.
Every September the popular Sagra del Risotto takes place, where every kind of risotto can be tasted; the events also include the Gran Premio del Risotto, a pedal-car race in which various teams (the contrade) compete for the cup. The municipality also holds Palazzo Plezza and the Chiesa di San Francesco e San Giovanni.