Traditionally Sarrabus, probably from the Roman-time city of Sarcopos, occupies the area of the communes of Castiadas, Muravera, San Vito and Villaputzu, corresponding to the curatory with the same name of the medieval giudicato of Cagliari.
Geologically, it dates to the Palaeozoic era and it is crossed by the Flumendosa, initially in a valley and then to a coastal plain on the Tyrrhenian Sea.
Specimens of the mineral ullmannite (NiSbS) were found at Sarrabus in 1887.
It is characterized by a series of plateaus divided by steep valleys, crossed by the Flumendosa.
Sights include a Megalithic necropolis near Goni, belonging to the culture of Ozieri and including several Domus de Janas, and a Holy Pit of Funtana Coberta, at Ballao.