Kumul (Hami) Prefecture (simplified Chinese: 哈密地区; pinyin: Hāmì Dìqū; Uyghur: قۇمۇل ۋىلايىتى‎, ULY: Qumul Wilayiti, UPNY: K̡umul Vilayiti^?) is located in eastern Xinjiang, China. It has an area of 140,749 km² and 492,096 inhabitants (2000).

The Ming Dynasty established this region as Kumul (Hami) Prefecture in 1404 after the Mongol kingdom Qara Del accepted its supremacy. But it was later controlled by Oirat Mongols. Since the 18th century, Kumul became the center of the Kumul Khanate, a semi-autonomous vassal state within the Qing Empire and the Republic of China as part of Xinjiang. The last ruler of the khanate was Maqsud Shah.

Of its inhabitants, 68.95% are Han, 18.42% are Uyghur, 8.76% are Kazakh, 2.97% are Hui, with the remainder belonging to other nationalities.

A newly discovered nickel mine in Hami is estimated to contain reserves of over 15.8 million tons of the metal, it therefore ranks as China's second largest nickel mine. Around 900,000 tons of nickel has already been detected.

Gao Chang (born January 29, 1987 in Jinan, Shandong, China) is a female Chinese swimmer, who competed at the 2004 Summer Olympics and who was a part of China's 2008 Olympic Team. Gao Chang won the gold in the 50-metre backstroke final of 2010 Asian Games.