Kea-Kythnos is one of the regional units of Greece. It is part of the region of South Aegean

South Aegean

The South Aegean is one of the thirteen regions of Greece. It consists of the Cyclades and Dodecanese island groups in the central and southeastern Aegean Sea.- Administration :...

. The regional unit covers the islands of Kea

Kea (island)

Kea , also known as Gia or Tzia , Zea, and, in Antiquity, Keos , is an island of the Cyclades archipelago, in the Aegean Sea, in Greece. Kea is part of the Kea-Kythnos peripheral unit. Its capital, Ioulis, is inland at a high altitude and is considered quite picturesque...

, Kythnos

Kythnos

Kythnos is a Greek island and municipality in the Western Cyclades between Kea and Serifos. It is from the harbor of Piraeus. Kythnos is in area and has a coastline of about . It has more than 70 beaches, many of which are still inaccessible by road...

 and several smaller islands in the Aegean Sea

Aegean Sea

The Aegean Sea[p] is an elongated embayment of the Mediterranean Sea located between the southern Balkan and Anatolian peninsulas, i.e., between the mainlands of Greece and Turkey. In the north, it is connected to the Marmara Sea and Black Sea by the Dardanelles and Bosporus...

.

Administration

As a part of the 2011 Kallikratis government reform, the regional unit Kea-Kythnos was created out of part of the former Cyclades Prefecture. It is subdivided into 2 municipalities. These are (number as in the map in the infobox):

• Kea
  Kea (island)
  Kea , also known as Gia or Tzia , Zea, and, in Antiquity, Keos , is an island of the Cyclades archipelago, in the Aegean Sea, in Greece. Kea is part of the Kea-Kythnos peripheral unit. Its capital, Ioulis, is inland at a high altitude and is considered quite picturesque...
  
   (8)
• Kythnos
  Kythnos
  Kythnos is a Greek island and municipality in the Western Cyclades between Kea and Serifos. It is from the harbor of Piraeus. Kythnos is in area and has a coastline of about . It has more than 70 beaches, many of which are still inaccessible by road...
  
  (10)