Wuzhai County is located in the west of Xinzhou City, Shanxi Province. With a total area of 1387.6 square kilometers, Wuzhai County has jurisdiction over 3 towns, 7 townships and 107 administrative villages. County people's government in Yan town. High terrain in the southeast, low in the west. To the southeast of the Shishan District, the main peak Luya Mountain 2736 meters above sea level, the highest county. Central for the "D" shaped basin, with Sancha for the lowest elevation of 1300 meters. The north and northwest are loess hills. The main river in Wuzhai County is Zhujiachuan River and its tributary Qinglian River. The average annual temperature is 4.3℃, minus 14℃ in January and 19℃ in July. Annual rainfall of 500 mm, frost-free period 120 days.
According to the seventh census, as of midnight on November 1, 2020, the permanent population of Wuzhai county was 100,220. In 2020, the GDP of Wuzhai County reached 3.142 billion yuan, an increase of 3.3 percent.

Wuzhai County is one of the water-rich areas in Shanxi Province. There are many rivers in the county, so it is known as "the county sitting on the reservoir". Nanshan Ecological and natural Tourism Area is known as the "Wuzhaigou" in the north. There are Luya Mountain and other scenic spots.
On September 25, 2018, it was awarded the honorary title of "2018 E-commerce into Rural Comprehensive Demonstration County" by the Ministry of Commerce. On April 18, 2019, the People's Government of Shanxi Province approved the removal of Wuzhai County from the poverty-stricken county.