Dingbian County is located in the northwest of Shanxi Province, the western end of Yulin City, Shanxi, Gansu, Ningxia and Mongolia four provinces (regions) and seven counties (flags) junction, ancient has "east Yuyan, west Ganliang, south adjacent to Huanqing, north pillow desert, soil wide border length, Sanqin fortress". It is the northwest gateway of Shanxi Province and the west gateway of Yulin City. Since ancient times, businessmen gathered, known as the "dry pier" said. County jurisdiction 1 sub-district office 14 towns 4 townships. The total land area of the county is 6920 square kilometers. According to the seventh census, the permanent population of Dingbian County was 339,077 as of midnight on November 1, 2020.

In 2020, Dingbian County achieved a gross regional product of 26.315 billion yuan; Total investment in fixed assets reached 13.5 billion yuan, up 8.1% year on year

Dingbian treasures, outstanding people, Shanxi is a bright "jammed pearl". Dingbian is "China's top 100 Counties of new energy Industry", "the first batch of National green Energy Demonstration Counties", "National green environmental protection and energy saving Demonstration counties", "the Hometown of Chinese potato specialty", "the Hometown of Chinese potato Cuisine", "the hometown of Chinese folk paper-cut art", "Shanxi Province Modern Agriculture Demonstration Base" and so on. In December 2017, it was selected as one of the first national fitness demonstration counties in Shanxi Province.

On September 29, 2018, the county was removed from the poverty-stricken county list. On January 25, 2019, it was selected as the national "Safe Agricultural Machinery" demonstration County in 2018. In March 2019, it was listed as the first batch of counties under the protection and utilization of revolutionary cultural relics. The top 100 counties and cities in Western China.