The Vilayet of the Archipelago (Ottoman Turkish: ولايت جزائر بحر سفيد, Vilâyet-i Cezair-i Bahr-i Sefid,[2][3] "Vilayet of the Islands of the Mediterranean Sea") was a first-level administrative division (vilayet) of the Ottoman Empire extant from 1867 to 1912–13, including, at its maximum extent, the Ottoman Aegean islands, Cyprus and the Dardanelles Strait.

At the beginning of the 20th century, it reportedly had an area of 4,963 square miles (12,850 km2), while the preliminary results of the first Ottoman census of 1885 (published in 1908) gave the population as 325,866.

[1] The accuracy of the population figures ranges from "approximate" to "merely conjectural" depending on the region from which they were gathered.

[4][5] Until 1876/7, when it was transferred to the Istanbul Vilayet,[6] the sanjak (sub-province) of Biga was the capital (pasha-sanjak), with the seat of the governor at Kale-i Sultaniye, while the other sanjaks were those of Rodos (Rhodes), Midilli (Lesbos), Sakiz (Chios), Limni (Lemnos), and Kıbrıs (Cyprus).

[4] Of the Aegean islands, Imbros and Tenedos remained finally under Turkish rule according to the Treaty of Lausanne (1923), while the Dodecanese passed to Greece after World War II.