Magomadas is a comune, or municipality, situated in the Province of Oristano within the Italian region of Sardinia. It is located approximately 130 kilometres (81 mi) northwest of the capital city of Cagliari and about 40 kilometres (25 mi) north of Oristano.
The municipality serves as a local administrative division in the western part of the island, positioned within the geographical boundaries of the Province of Oristano.