The patron of Guastalla is Saint Catherine of Alexandria, celebrated on 25 November with the traditional Fiera di Santa Caterina.
Every three years, at the end of May, La Gnoccata is celebrated, a folk feast dating back to the 19th century, while the Piante e Animali event is held every fourth week of September. The town holds the Cathedral of Guastalla and the Ducal Palace, as well as the Ruggero Ruggeri municipal theatre.