Dai County, under the Xinzhou City of Shanxi Province. Located in the northeast of Shanxi Province, it is located at 112°43 '-- 113°21' east longitude, 38°49 '-- 39°21' north latitude, bordering Fanzhi in the east, Yuanping in the west, Wutai in the south, and Pishanyin in the north. Hutuo River runs southwest across the whole territory. It is 60 kilometers long from north to south and 40 kilometers wide from east to west. The total area is 1721.5 square kilometers. As of May 2021, it has jurisdiction over 195 administrative villages in 7 towns and 2 townships. According to the seventh census, as of midnight on November 1, 2020, the permanent population of Daixian county was 178,870.

In 2020, the GDP of Daixian County reached 7.16 billion yuan, with a year-on-year growth of 6.6%.
Daixian County is a national historical and cultural city. It has been named by the Ministry of Culture as "the Hometown of Chinese Folk Painting" and "the Hometown of Chinese folk culture and art".

On February 27, 2020, with the approval of Shanxi Provincial government, Daixian County was removed from the poverty-stricken county.