Vilâyet

Vilâyet, or vilayet, is a term for a top-level administrative division used in the Ottoman Empire and, by extension, in Turkish historical and constitutional vocabulary. The word comes from the Arabic wilāyah, meaning jurisdiction, governance, or province.

In the Ottoman system, vilayets were created and standardized during the Tanzimat era, formalized by the Vilayet Law of 1864 to replace the older eyalet structure. Each vilayet was headed by a vali (governor) appointed by the sultan and reporting to the central administration in Istanbul. The reform sought to create greater central oversight, uniform administration, taxation, and military organization across the empire.

A vilayet was subdivided into sanjaks (also called livas), governed by sanjak-beys. Sanjaks contained kazas (districts) and nahiye (subdistricts), overseen by officials such as kaymakams. In some vilayets, the sanjak-level administrator could be a mutasarrıf, a more autonomous governor under direct central supervision. The system was designed to balance centralized authority with local governance, though central authorities retained control over finance, military, and major policy decisions.

With the dissolution of the Ottoman Empire after World War I, the vilayet structure largely gave way to new administrative arrangements in successor states. In modern Turkey, the corresponding unit is the il (province), governed by a vali appointed by the central government. The term vilâyet persists primarily in historical usage and in some languages as wilāya or wilayet, reflecting its Ottoman and regional legacy.