Kütahya Province (Turkish: Kütahya ili) is a province in the Aegean region of Turkey. Its area is 11,634 km, and its population is 580,701 (2022). In 1990, Kütahya had a population of 578,000.
The neighboring provinces are Bursa to the northwest, Bilecik to the northeast, Eskişehir to the east, Afyon to the southeast, Usak to the south, Manisa to the southwest and Balıkesir to the west.
Bilecik Province (Turkish: Bilecik ili) is a province in midwest Turkey, neighboring Bursa to the west, Kocaeli and Sakarya to the north, Bolu to the east, Eskişehir to the southeast and Kütahya to the south. Its area is 4,179 km, and its population is 228,673 (2022). Most of the province laid down in Marmara region but eastern parts of Gölpazarı and Söğüt district and districts of İnhisar and Yenipazar remained in Black Sea Region, smaller southeastern parts of Bozüyük and Söğüt remained in Central Anatolia Region and smaller southwestern part of Bozüyük remained in Aegean Region.
Bursa Province (Turkish: Bursa ili) is a province and metropolitan municipality in Turkey along the Sea of Marmara coast in northwestern Anatolia. It borders Balıkesir to the west, Kütahya to the south, Bilecik and Sakarya to the east, Kocaeli to the northeast and Yalova to the north. Its area is 10,813 km, and its population is 3,194,720 (2022). Its traffic code is 16.
Almost all of Bursa Province (including the city of Bursa) is in the Marmara region, but the districts of Büyükorhan, Harmancık, Keles and Orhaneli are in the Aegean Region.
Balıkesir Province (Turkish: Balıkesir ili) is a province and metropolitan municipality in northwestern Turkey with coastlines on both the Sea of Marmara and the Aegean. Its area is 14,583 km, and its population is 1,276,096 (2024). Its adjacent provinces are Çanakkale to the west, İzmir to the southwest, Manisa to the south, Kütahya to the southeast, and Bursa to the east. The provincial capital is Balıkesir. Most of the province lies in the Marmara Region except the southern parts of Bigadiç Edremit, Kepsut, İvrindi, Savaştepe and Sındırgı districts and ones of Ayvalık, Burhaniye, Dursunbey, Gömeç and Havran, that bound the Aegean Region. Kaz Dağı (pronounced [kaz daːɯ]), known also as Mount Ida, is located in this province. Balıkesir province is famous for its olives, thermal spas, and clean beaches, making it an important tourist destination. The province also hosts immense deposits of kaolinite and borax, with some open-pit mines. The Kaz mountains are also threatened with the expansion of gold mining using cyanide which puts the villagers' lives, the agricultural economy, and tourism at risk.
The Gediz River (Turkish: Gediz Nehri, Turkish pronunciation: [ˈɡediz]) is the second-longest river in Anatolia flowing into the Aegean Sea. From its source of Mount Murat in Kütahya Province, it flows generally west for 401 km (249 mi) to the Gediz River Delta in the Gulf of İzmir.
Manisa Province (Turkish: Manisa ili) is a province and metropolitan municipality in western Turkey. Its area is 13,339 km, and its population is 1,468,279 (2022). Its neighboring provinces are İzmir to the west, Aydın to the south, Denizli to the southeast, Uşak to the east, Kütahya to the northeast, and Balıkesir to the north. The city of Manisa is the seat and capital of the province. The traffic code is 45.
Eskişehir Province (Turkish: Eskişehir ili) is a province and metropolitan municipality in northwestern Turkey. Its area is 13,960 km, and its population is 906,617 (2022). Its adjacent provinces are Bilecik to the northwest, Kütahya to the west, Afyon to the southwest, Konya to the south, Ankara to the east, and Bolu to the north. The provincial capital is Eskişehir. Most of the province is laid down in Central Anatolia Region. Northern parts of Mihalıççık district and ones of Mihalgazi and Sarıcakaya are located in the Black Sea Region and one of them belong to the Aegean Region.
Eskişehir is an old and culturally developed province of Turkey. Eskişehir has 3 universities, Eskişehir Osmangazi University, Eskişehir Technical University and Anadolu University, which is the largest university in Turkey and which has some branch offices in Europe.
Kütahya (Turkish pronunciation: [cyˈtahja]) is a city in western Turkey which lies on the Porsuk River, at 969 metres above sea level. It is the seat of Kütahya Province and Kütahya District. Its population is 263,863 (2022). The region of Kütahya has large areas of gentle slopes with agricultural land culminating in high mountain ridges to the north and west.