Giba is a comune (municipality) in the province of South Sardinia, Sardinia, Italy.

Located in the southwestern Sulcis region of the island, the municipality consists of the villages of Giba proper, and Villarios, some 5 kilometres (3 mi) to the west, bordering on Masainas to the south, Piscinas to the east, Villaperuccio to the northeast, Tratalias to the north and San Giovanni Suergiu to the northwest. Two state roads cross the territory of Giba, the SS195 "Sulcitana" and the SS293.