The patron saint of Castelnuovo Rangone is Saint Celestine, celebrated on 6 April in the Church of San Celestino I Papa.
The first Sunday of December holds the Superzampone, a folk feast dedicated to the pig, symbol of the town's economy, honoured also with a bronze statue in the main square. The last week of May brings the Fiera di Maggio, with concerts, markets and shows. The town also holds the Museum of Cured Meats and the Archaeological Park of the Terramara di Montale.