Wanzhi County, located between 27°59 '37 "~28°27' 48" north latitude and 113°59 '13 "~114°36' 11" east longitude, is part of Dong 8 District with Beijing, but its average sunrise time is 22 minutes later than that of Beijing. It is located in the northwest border of Jiangxi Province, upstream of Jinjiang River, north of Fengding Mountain, east of Shanggao County and Yifeng County, south of Yuanzhou District, west of Liuyang City, Hunan Province, north of Tonggu County. According to the seventh census, the permanent population of Wanzai county was 486,435 as of midnight on November 1, 2020.

Wanzai County is 61 kilometers long from east to west and 52 kilometers wide from north to south, with a total area of 1,719.63 square kilometers, including 10.6 square kilometers of urban area.
The county is 185 km away from Nanchang Changbei International Airport of Jiangxi Province, 168 km away from Changsha Huanghua International Airport of Hunan Province, 42 km away from Mingyueshan Airport of Yichun, 39 km away from Yichun Railway Station of Shanghai-Kunming Railway (" Zhejiang-Jiangxi Line "), and 26 km away from Hu-Rui (" Chang-Jin Section ") Expressway. 320 National Road and "Xianggan", "Fangwan" two provincial roads through the border.
In 2020, Wanzai County's GDP reached 2.0901.37 million yuan, an increase of 3.3 percent over the previous year based on comparable prices.