The provinces of Turkey are organized into 7 census-defined regions (bölge), which were originally defined at the First Geography Congress in 1941. Regions as defined in this context is merely for statistical purposes and do not refer to an administrative division. Each region is listed below, with corresponding provinces within the region. However the official boundaries of the regions and the provinces do not overlap. Provinces, by custom, are accepted to be located in the regions where most of their territory remains.
Aegean Region (Ege Bölgesi)
Black Sea Region (Karadeniz Bölgesi)
Central Anatolia Region (İç Anadolu Bölgesi)
Eastern Anatolia Region (Doğu Anadolu Bölgesi)
Marmara Region (Marmara Bölgesi)
Mediterranean Region (Akdeniz Bölgesi)
Southeastern Anatolia Region (Güneydoğu Anadolu Bölgesi)