San Cesario sul Panaro (Modenese: San Gèr; Western Bolognese: San Cesèri) is a comune (municipality) in the Province of Modena in the Italian region Emilia-Romagna, located about 25 km northwest of Bologna and about 12 km southeast of Modena. Sports car manufacturer Pagani is located here. The town has a Romanesque-style church dedicated to Saint Caesarius of Terracina. The battle of San Cesario took place in the area in August 1229.