Monticelli d'Onina (Piacentino: Muntṡéi [muŋtˈzeːi]) is a comune (municipality) in the Province of Piacenza in the Italian region Emilia-Romagna, located about 130 kilometres (81 mi) northwest of Bologna and about 20 kilometres (12 mi) east of Piacenza.

Monticelli d'Onina borders the following municipalities: Caorso, Castelnuovo Bocca d'Adda, Castelvetro Piacentino, Cremona, Crotta d'Adda, San Pietro in Cerro, Spinadesco, Villanova sull'Arda.

Sights include the rocca (a 15th-century fortress built by Rolando Pallavicino), now housing an ethnographical museum, and the Abbey Basilica.

Natives of Monticelli d'Onina include the composer Amilcare Zanella.

This article on a location in Emilia–Romagna is a stub.