Wāli or vali (from Arabic والي Wāli) is an administrative title that was used during the Caliphate and Ottoman Empire to designate governors of administrative divisions. It is still in use in some countries influenced by Arab or Muslim culture. The division that a Wāli governs is called Wilayah, or, in the case of Ottoman Turkey, "Vilayet".
In Algeria, a wāli is the "governor" and administrative head of each of the 48 provinces of the country, and is chosen by the president.
In Iran the term is known as Vāli and refers to the governor-general or local lord of an important province. During the Safavid reign 1501-1722 the former rulers of the then subordinated provinces of the Georgian Kartli and Kakheti kingdom, the Kurdish emirate of Ardalan, the chiefs of Lorestān Province and of Khuzestan Province in western Iran were regarded as hereditary governor-generals titled Vāli equal to the Beylerbeylik (Safavid Persia). These "lords of the marches" should protect Iran's western borders against foreign powers. During the Qajar rule 1785-1925 the kingdom of Georgia was lost to Russia and the hereditary lords were replaced by officials of the central power. Mainly these officials came from the group of imperial princes and royal notables and were made Vāli of important provinces. For example the crown prince bore traditionally the title of Vāli of Azerbaijan (Iran) .