The patron saint of Zagarolo is Saint Lawrence, celebrated on 10 August in the church dedicated to him.
The town holds the Toy Museum of Zagarolo and the 740.171 steam locomotive, as well as the Parish of San Pietro Apostolo. Among the town's places of interest are also the houses of the Congregation of the Daughters of Our Lady of the Eucharist and of the Convent of the Canossian Daughters of Charity.
