Gesico () is a comune (municipality) in the Metropolitan City of Cagliari in the Italian region Sardinia, located about north of Cagliari. As of 31 December 2004, it had a population of 954 and an area of .
Gesico borders the following municipalities: Escolca, Guamaggiore, Guasila, Mandas, Selegas, Suelli, Villanovafranca.