Administrative division of Greece following the "Kallikratis" reform: each colour denotes a region, regional units are outlined in black, and municipalities in white
The 74 regional units (Greek: περιφερειακές ενότητες, sing. περιφερειακή ενότητα) are administrative units of Greece. They are subdivisions of the country's 13 regions, further subdivided into municipalities. They were introduced as part of the "Kallikratis" administrative reform on 1 January 2011 and are comparable in size and often coterminous with the pre-"Kallikratis" prefectures of Greece.