Gioura (Greek: Γιούρα), sometimes romanized as Youra, is a Greek island and abandoned settlement in the eastern part of the Northern Sporades. It is administratively part of the municipality of Alonnisos. The island name comes from the ancient Greek Gerontia (Γεροντία). The 1991 census counted one inhabitant making it the smallest municipal district in Greece in population. As of 2011, it had no resident population. Gioura is in Zone A of the Alonnisos Marine Park.