Sinnai 辛纳伊
Sinnai, Sìnnia in Sardinian language, is a comune (municipality) of the Cagliari metropolitan area in the Province of Cagliari in the Italian region Sardinia, located about 12 kilometres (7 mi) northeast of Cagliari.
According to 2011 census, it has 16,730 inhabitants.
Sinnai borders the following municipalities: Burcei, Castiadas, Dolianova, Maracalagonis, Quartucciu, San Vito, Settimo San Pietro, Soleminis, ****, Villasimius.