Princes' Islands
| Princes' Islands Adalar | |
|---|---|
| District and municipality | |
| Map showing Adalar District in Istanbul Province | |
| Coordinates: 40°52′N 29°06′E / 40.867°N 29.100°E | |
| Country | Turkey | 
| Province | Istanbul | 
| Government | |
| • Mayor | Erdem Gül (CHP) | 
| Area | 11 km2 (4 sq mi) | 
| Population  (2022) | 16,690 | 
| • Density | 1,500/km2 (3,900/sq mi) | 
| Time zone | UTC+3 (TRT) | 
| Postal code | 34970 | 
| Area code | 0216 | 
| Website | www | 
The Princes' Islands (Turkish: Prens Adaları; the word "princes" is plural, because the name means "Islands of the Princes", Greek: Πριγκηπονήσια, Pringiponisia), officially just Adalar (English: Islands); alternatively the Princes' Archipelago; is an archipelago off the coast of Istanbul, Turkey, in the Sea of Marmara. The islands constitute the municipality and district of Adalar within Istanbul Province. With a total land area of 11 km2 (4.2 sq mi), it is the fifth smallest district in Istanbul, and with a permanent population of 16,690 (2022), it is by far the least populous district in Istanbul.
Adalar District is made up of the main 4 Büyükada, Kınalıada, Burgazada and Heybeliada islands and the other smaller islands.