The patron of Bellusco is Saint Justina, celebrated on the second Sunday of September in the Church of Santa Giustina.
Every September, among the town's districts, the Palio di Santa Giustina is contested, with a jury judging the best biblically-themed flower float: the tradition dates back to 1955. On those days, the case holding the saint's relics is also displayed. The town also holds the Church of Santa Maria Maddalena and the Castle of Bellusco.