Xinyuan County (formerly Künes County) (Chinese: 新源县; Pinyin: Xīnyuán Xiàn) is a county situated within the Xinjiang Uyghur Autonomous Region and is under the administration of the Ili Kazakh Autonomous Prefecture. It contains an area of 7,581 km2. According to the 2002 census, it has a population of 290,000.
The county's original name Künes was changed into Xinyuan in 1946 after the county established its seat on the river upstream. "Xinyuan" means "New Headstream" in Chinese.
Coordinates: 43°27′04″N 83°08′52″E / 43.45111°N 83.14778°E