Manas County is subordinate to Changji Hui Autonomous Prefecture of Xinjiang Uygur Autonomous Region. It is located at the west end of Changji Hui Autonomous Prefecture, the middle section of the northern slope of the Tianshan Mountains, the southwest edge of the Junggar Basin, and the east bank of the Manas River. It is adjacent to Hutubi County with Ganhezi as the boundary in the east, Shihezi City and Shawan County of Tacheng District across the Manas River in the west, and Hejing County of Bayingolin Mongolian Autonomous Prefecture with Tianshan Watershed in the south, and Tacheng District and Buksel Mongolian Autonomous County in the Gurbantunggut Desert in the north, with a total area of 11067 square kilometers. As of October 2021, Manas County has jurisdiction over 7 towns, 4 townships, 5 regimental farms, and another 3 township units. As of May 2021, Manas County has a total population of 280000.

Manas, which means patrol in Mongolian, is named after the patrol soldiers along the Manas River in ancient times, meaning "hero". In the forty-third year of Qianlong's reign in the Qing Dynasty (1778), Suilai County was established. In 1954, Suilai County was changed to Manas County. In 1979, the Shihezi region was abolished, and Manas County reverted to Changji Hui Autonomous Prefecture.

In the first half of 2021, Manas County completed 7.238 billion yuan of gross regional product (GDP), with a year-on-year increase of 7.2% (at comparable prices); The added value of the first production was 1.186 billion yuan, up 2.2% year on year; The added value of the second industry was 2.611 billion yuan, up 9.7% year on year; The added value of the tertiary industry was 3.442 billion yuan, up 7.1% year on year, and the ratio of the tertiary industry structure was 16.4:36.1:47.5.