The 74 regional units (Greek: περιφερειακές ενότητες, perifereiakés enóti̱tes, sing. περιφερειακή ενότητα, perifereiakí̱ enóti̱ta) 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 area and, in the mainland, coterminous with the pre-"Kallikratis" prefectures of Greece.
- "Text of Greek Law 3852/2010: Kallikratis reform" (PDF) (in Greek). 11 August 2010.