Among the patrons of Marcallo con Casone are Saints Nazarius and Celsus, celebrated on 28 July in the Parish Church of Santi Nazaro e Celso; the other patrons, Charles and Joseph, are instead celebrated on 4 November.
On 25 April, the San Marco Fair is held, of a craft and commercial nature, recognized as a regional fair: until the mid-1950s, it also included a religious component. The town also holds Villa Magnaghi and the Parco Tullio Oldani.