The patrons of Casnigo are Saint John the Baptist and Saint Sebastian, celebrated on 5 August in the Church of San Giovanni Battista.
On Good Friday, the traditional Procession of the Dead Christ winds from the cemetery, with a 20th-century statue by an unknown author, and Via Crucis stations set up in different parts of the town. The town also holds the Madonna d'Erbia shrine and overlooks Pizzo Frol.