Tiana, Tìana in Sardinian language, is a comune (municipality) in the Province of Nuoro in the Italian region Sardinia, located in a valley on the slopes of Gennargentu mountain in the Ollolai Barbagia, about 150 kilometres (93 mi) north of Cagliari and about 50 kilometres (31 mi) southwest of Nuoro. As of 31 December 2004, it had a population of 547 and an area of 19.3 square kilometres (7.5 sq mi).

Tiana borders the following municipalities: Austis, Desulo, Ovodda, Sorgono, Teti, Tonara.

The village is located about 600 meters above sea level. The peaks framing it exceed 1000 meters in altitude and constitute the last outposts of the Gennargentu mountain range. The highest point in the territory is Bruncu Muncinale, at 1267 meters above sea level. The village is surrounded by a charming verdant landscape, covered with a thick mantle of ilex and cork trees, as well as chestnut and walnut trees. Tiana is included in the National Park of the Bay of Orosei and Gennargentu.

The Tiana area has been settled since Neolithic times as evidenced by the presence of Domus de Janas in the Mancosu aerea, as well as some remains of Nuraghic settlements in the Sa Piraera and Tudulo areas.