Eskişehir is a city in northwestern Turkey and the capital of the Eskişehir Province. The urban population of the city is 898,369 with a metropolitan population of 797,708. The city is located on the banks of the Porsuk River, 792 m above sea level, where it overlooks the fertile Phrygian Valley. In the nearby hills one can find hot springs. The city is 233 km (145 mi) to the west of Ankara, 330 km (205 mi) to the southeast of Istanbul and 78 km (48 mi) to the northeast of Kütahya. It is located in the vicinity of the ancient city of Dorylaeum. Known as a university town; Eskişehir Technical University, Eskişehir Osmangazi University, and Anadolu University are based in Eskişehir. The province covers an area of 2,678 km2 (1,034 sq mi).

Eskişehir Province is a province and metropolitan municipality in northwestern Turkey. Its area is 13,960 km2, 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.