Dingyuan County is located in the middle of Jianghuai and the east of Anhui Province. Dingyuan is connected to Hefei in the south, Huainan in the west, Bengbu in the north and Chuzhou in the east. Close to Nanjing metropolitan area and Hefei economic circle, far away from the Yangtze River Delta Economic Zone. Dingyuan has a total area of 2,998 square kilometers and governs 16 towns and 6 townships. It is the most populous county in eastern Anhui with a permanent population of 67 1.

Dingyuan had the reputation of "connecting eight border cities and thoroughfare nine provinces" in ancient times, and it is still the hub of China. Beijing-Shanghai high-speed railway and Huainan railway run through the territory, and Beijing, Taiwan and expressway run through the territory. Dingyuan county is a famous agricultural county, which was listed as the national lean pig base in 1987. 1996-2009, Dingyuan was ranked among the top ten counties of animal husbandry production in Anhui province for 14 years, and won the title of national advanced county of grain production for 201year. Dingyuan is also a national commodity grain and oil county and a national rock county.