Berchidda (Gallurese: Bilchidda, Sardinian: Belchidda) is a comune (municipality) in the Province of Olbia-Tempio in the Italian region Sardinia, located about 170 kilometres (110 mi) north of Cagliari and about 30 kilometres (19 mi) southwest of Olbia.It is located near Lake Coghinas in a hilly area bordered on the north by the Limbara mountain range.Berchidda borders the following municipalities: Alà dei Sardi, Calangianus, Monti, Oschiri, Tempio Pausania.