Sant'Ilario d'Enza ("Saint Hilarius on the Enza"; ) is a (municipality) in the Province of Reggio Emilia in the Italian region of Emilia-Romagna, located about northwest of Bologna and about northwest of Reggio Emilia.
Sant'Ilario d'Enza borders the following municipalities: Campegine, Gattatico, Montecchio Emilia, Montechiarugolo, Parma, Reggio Emilia.
Sant'Ilario d'Enza is twinned with: