The Regional District Kea - Kythnos (Greek Periferiaki Enotita Keas - Kythnou Περιφερειακή Ενότητα Κέας - Κύθνου ) is one of 13 regional districts of the Greek region South Aegean. It was formed on the occasion of the administrative reform in 2010 of two island communities of the former Cyclades Prefecture. Proportional to its 3,911 inhabitants sent to the field a representative to the Regional Council, but has no more political significance than local authority. It is divided into the two communities Kea and Kythnos.