One of the patrons of Fontana Liri is Saint Stephen, celebrated on 26 December.
The town holds the Shrine of Maria Santissima di Loreto, whose feast is celebrated between July and August: legend has it that, around the mid-17th century, a traveler passing by a small chapel gave rise to it. The town also holds the Castello di Succorte and the Quercia di San Bernardo (San Bernardo oak). The town's other patron, Saint Barbara, is celebrated on 4 December.