Lamberto Visconti di Eldizio (died 1225) was the Judge of Gallura from 1206, when he married the heiress Elena, to his own death. He was a member of the Visconti family of Pisa and the first of that dynasty to rule in Sardinia, where they lasted in Gallura for almost another century. His grandfather, , was a patrician of Pisa, while his father, , was patrician and consul (1184–1185). He and his brother Ubaldo in turn served as patrician and podestà. Lambert's grandmother was Aligarda and his mother was a daughter of Torchitorio III of Cagliari.