| Marrubiu | |
| Official Name: | Comune di Marrubiu |
| Native Name: | Marrùbiu |
| Pushpin Map: | Italy Sardinia |
| Coordinates: | 39.75°N 46°W |
| Region: | Sardinia |
| Province: | Oristano (OR) |
| Mayor: | Andrea Santucciu |
| Area Total Km2: | 61.24 |
| Population Footnotes: | [1] |
| Population Total: | 4816 |
| Population As Of: | 30 September 2017 |
| Population Demonym: | Marrubiesi, Marrubiesus |
| Elevation M: | 7 |
| Postal Code: | 09094 |
| Area Code: | 0783 |
Marrubiu (Marrùbiu in the Sardinian language) is a comune (municipality) in the Province of Oristano in the Italian region Sardinia, located about 70km (40miles) northwest of Cagliari and about 15km (09miles) south of Oristano.
Marrubiu borders the following municipalities: Ales, Arborea, Morgongiori, Santa Giusta, Terralba, Uras.