| Short Title: | Kleisthenis I Programme |
| Legislature: | Hellenic Republic |
| Imagealt: | Coat of arms of Greece |
| Long Title: | New Architecture of Self-governing Entities and Deconcentrated Administration – Kleisthenis I Programme |
| Citation: | Kleisthenis I Programme. 4555/2018. el. 19 July 2018. |
| Territorial Extent: | Greece |
| Enacted By: | Hellenic Parliament |
| Date Signed: | 19 July 2018 |
| Signed By: | President Prokopis Pavlopoulos |
| Bill: | 4555/2018 |
| Introduced By: | Government of Greece |
Kleisthenis I Programme (Greek, Modern (1453-);: Πρόγραμμα Κλεισθένης Ι|Prógramma Kleisthénis I) is the common name of Greek law 4555/2018 of July 2018, a major administrative reform in Greece. It brought about the third major reform of the country's administrative divisions following the 1997 Kapodistrias reform and the 2010 Kallikratis Programme. Named after ancient Greek legislator Cleisthenes, the programme was adopted by the Hellenic Parliament in July 2018 and implemented in September 2019.[1]
The goal of the Kleisthenis I Programme was to reform the election procedures and to strengthen the competences of the local administrative units. The main changes were:
Also, five municipalities that were created at the Kallikratis reform (Corfu, Cephalonia, Servia-Velventos, Lesbos and Samos) were divided into smaller municipalities.[2]