Bilia is a commune in the Corse-du-Sud department of France, on the island of Corsica, within its Corsican single territorial collectivity. It is …Bilia is a commune in the Corse-du-Sud department of France, on the island of Corsica, within its Corsican single territorial collectivity. It is part of the microregion of Bisogène, the south-western part of the Corsican region of Rocca.