Aidomaggiore () is a village and comune (municipality) in the Province of Oristano in the autonomous island region of Sardinia in Italy. Aidomaggiore is located about north of Cagliari and about northeast of Oristano. It has inhabitants.
Aidomaggiore borders the municipalities of Borore, Dualchi, Ghilarza, Norbello, Sedilo, and Soddì.