| South Aegean | |
| Native Name: | Greek, Modern (1453-);: Περιφέρεια Νοτίου Αιγαίου |
| Type: | Administrative region |
| Coordinates: | 36.8°N 26.2°W |
| Subdivision Type: | Country |
| Subdivision Name: |  Greece |
| Subdivision Type1: | Decentralized Administration |
| Subdivision Name1: | Aegean |
| Leader Title: | Regional governor |
| Leader Name: | Giorgos Hatzimarkos |
| Parts Type: | Regional units |
| Parts Style: | list |
| P1: | Andros |
| P2: | Kalymnos |
| P3: | Karpathos-Kasos |
| P4: | Kea-Kythnos |
| P5: | Kos |
| P6: | Milos |
| P7: | Mykonos |
| P8: | Naxos |
| P9: | Paros |
| P10: | Rhodes |
| P11: | Syros |
| P12: | Thira |
| P13: | Tinos |
| Seat Type: | Capital |
| Seat: | Ermoupoli |
| Seat1 Type: | Largest city |
| Seat1: | Rhodes |
| Area Total Km2: | 5286 |
| Population Total: | 324542 |
| Population As Of: | 2021 |
| Population Density Km2: | auto |
| Population Footnotes: | [1] |
| Demographics Type2: | GDP |
| Demographics2 Title1: | Total |
| Demographics2 Info1: | €5.976 billion (2021) |
| Timezone: | EET |
| Utc Offset: | +2 |
| Timezone Dst: | EEST |
| Utc Offset Dst: | +3 |
| Iso Code: | GR-L |
| Blank Name Sec2: | HDI (2019) |
| Blank Info Sec2: | 0.850[2] · 10th of 13 |
The South Aegean (Greek, Modern (1453-);: Περιφέρεια Νοτίου Αιγαίου|translit=Periféria Notíou Eyéou, in Greek, Modern (1453-); pronounced as /periˈferia noˈtiu eˈʝeu/) is one of the thirteen administrative regions of Greece. It consists of the Cyclades and Dodecanese island groups in the central and southeastern Aegean Sea.
The South Aegean region was established in the 1987 administrative reform. With the 2010 Kallikratis plan, its powers and authority were redefined and extended. Along with the North Aegean region, it is supervised by the Decentralized Administration of the Aegean based at Piraeus. The capital of the region is situated in Ermoupoli on the island of Syros. The administrative region includes 50 inhabited islands, including the popular tourism destinations of Mykonos, Santorini and Rhodes.[3]
Until the Kallikratis reform, the region consisted of the two prefectures of the Cyclades (capital: Ermoupoli) and the Dodecanese (capital: Rhodes). Since 1 January 2011 it is divided into 13 regional units, formed around major islands:[4]
The region was the only one in Greece to grow in population between 2011 and 2021, adding a total of 15,527 people (increase of 5%).[1] It overtook Epirus and is presently the 9th largest region by population in Greece.
The Gross domestic product (GDP) of the province was 6.4 billion € in 2018, accounting for 3.5% of Greek economic output. GDP per capita adjusted for purchasing power was 22,400 € or 74% of the EU27 average in the same year. The GDP per employee was 79% of the EU average. South Aegean is the region in Greece with the second highest GDP per capita.[5]