Turkey is divided into 81 provinces (Turkish: il). Each province is divided into a number of districts (ilçe). Each provincial government is seated in the central district (merkez ilçe). For non-metropolitan municipality designated provinces, the central district bears the name of the province (e.g. the city/district of Rize is the central district of Rize Province). In the Ottoman Empire, the corresponding unit was the vilayet.
After the collapse of the Ottoman Empire and the official establishment of the Republic of Turkey on 29 October 1923, changes were made to the administrative system. Two years later, Ardahan, Beyoğlu, Çatalca, Dersim, Ergani, Gelibolu, Genç, Kozan, Oltu, Muş, Siverek and Üsküdar provinces were transformed into districts. In 1927, Doğubayazıt was transformed into a district and was made a part of Ağrı. In 1929, Muş became a province again and Bitlis became a district. Four years later, Aksaray, Cebelibereket, Hakkâri and Şebinkarahisar became districts, Mersin and Silifke were merged to form a new province called İçel, and Artvin and Rize were merged to form a new province called Çoruh, bringing the number down to fifty-six. In 1936, Rize, Dersim and Hakkâri became provinces again, in the same year Dersim was renamed Tunceli; 3 years later in 1939, Hatay was annexed to Turkey and became a province. In 1953, it was decided that Uşak would become a province and that Kırşehir would be transformed into a district, one year later in 1954 Adıyaman, Nevşehir and Sakarya gained province status. In 1956, the name of Çoruh province was changed to Artvin, and in 1957 Kırşehir's province status was restored. After this year, there were no changes in the number of provinces for the next 32 years until Aksaray, Bayburt, Karaman and Kırıkkale became provinces in 1989 along with Batman and Şırnak in 1990; Bartın in 1991; Ardahan and Iğdır in 1992; Yalova, Karabük and Kilis in 1995; Osmaniye in 1996, and Düzce in 1999.
Below is a list of the 81 provinces of Turkey, sorted according to their license plate codes. Initially, the order of the codes matched the alphabetical order of the province names. After Zonguldak (code 67), the ordering is not alphabetical, but in the order of the creation of provinces, as these provinces were created more recently and thus their plate numbers were assigned after the initial set of codes had been assigned.
