Roncaglia may refer to:
Roncaglia (surname), a surname of Italian origin
Places Roncaglia (Piacenza), a frazione of Piacenza, Italy Roncaglia, a frazione of Casale Monferrato, Italy Roncaglia, a frazione of Ponte San Nicolò, Italy Roncaglia, a frazione of San Giovanni Bianco, Italy Roncaglia, a frazione of Roletto, Italy
Other uses Diet of Roncaglia, held in 1158 near Piacenza, a general assembly of the nobles and ecclesiasts of the Holy Roman Empire