Elmas is a comune of the Metropolitan City of Cagliari in the Italian region of Sardinia, located about 8 kilometres northwest of Cagliari. Until 1989 Elmas was a district of Cagliari. It is best known locally as the location for the airport which serves Cagliari, some 7 kilometres to the east to the town. According to 2011 census, it has 8,949 inhabitants.