Diyarbekir vilayet
The Vilayet of Diyâr-ı Bekr was a first-level administrative division of the Ottoman Empire, wholly located within what is now modern Turkey. The vilayet extended south from Palu on the Euphrates to Mardin and Nusaybin on the edge of the Mesopotamian plain. After the establishment of Republic of Turkey in 1923, the region was incorporated into the newly created state.
At the beginning of the 20th century, Diyarbekir Vilayet reportedly had an area of, while the preliminary results of the first Ottoman census of 1885 gave the population as 471,462. The accuracy of the population figures ranges from "approximate" to "merely conjectural" depending on the region from which they were gathered.
History
The Vilayet of Diyarbakir was created in 1867. In 1867 or 1868 Mamuret-ul-Aziz and the Kurdistan Eyalet merged with and joined the Vilayet of Diyarbakir. In 1879–80 Mamuret-ul-Aziz was separated again from the Vilayet of Diyarbakir, and turned into the Vilayet of Mamuret-ul-Aziz. It was one of the six Armenian Vilayets of the Empire.Administrative divisions
[file:Diyarbakir Vilayet — Memalik-i Mahruse-i Shahane-ye Mahsus Mukemmel ve Mufassal Atlas (1907).jpg|thumb|right|250px|Map of subdivisions of Diyarbekir Vilayet in 1907]Sanjaks of the vilayet:
Demographics
The Vilayet was a place in which the Christian population was systematically massacred during World War I during the 1915 genocide in Diyarbekir.| Denomination | Prewar population | Postwar population | Disappeared |
| Armenian Apostolic Church | 60,000 | 2,000 | 58,000 |
| Armenian Catholic Church | 12,500 | 1,000 | 11,500 |
| Chaldean Catholic Church | 11,120 | 1,110 | 10,010 |
| Syriac Catholic Church | 5,600 | 2,150 | 3,450 |
| Syriac Orthodox Church | 84,725 | 24,000 | 60,725 |
| Protestantism | 725 | 225 | 500 |
| Total | 174,670 | 30,485 | 144,185 |