Odunpazarı is a municipality and district of Eskişehir Province, Turkey. Its area is 1,120 km², and its population is 422,423 (2022), 47% of the provincial population. Odunpazarı District covers the southern part of Greater Eskişehir, including the historic center, and the adjacent countryside.

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.