San Fernando is a town in the province of Cádiz, Spain. It is home to more than 97,500 inhabitants. The city also uses the name "La Isla". The p…San Fernando is a town in the province of Cádiz, Spain. It is home to more than 97,500 inhabitants. The city also uses the name "La Isla". The people from San Fernando are locally known as "Cañaíllas" or "Isleños".