Dancheng County is subordinate to Zhoukou City, Henan Province. It is located in the east of Henan Province, between 33 ° 25 '~33 ° 49' N and 115 ° 00 '~115 ° 38' E. The total area is 1490 square kilometers. Dancheng County has a warm temperate continental monsoon climate. As of October 2021, Dancheng County has jurisdiction over 3 streets, 8 towns and 11 townships. The county people's government is located in Xincheng Street. By 2021, the total population of Dancheng County is 1.3723 million.

It is said that in the Spring and Autumn Period, Laozi refined the "Dan" here, so it was called "Dancheng". Later, it was called Dancheng. In Sui Dynasty, it was set in Dan County. In 2000, Zhoukou District was abolished and a prefecture level Zhoukou City was established. Dancheng County was subordinate to Zhoukou City. Dancheng County is known as the "thoroughfare of two provinces and three counties". The high-grade highways extend in all directions, with G344 running from east to west, G220 running from north to south, and S211, S214, and S324 converging here. It mainly includes Duanzhai Site, Yudui Village Site, Jizhong Site, etc. Dancheng County is one of the second batch of counties that have reached the standard of water-saving society construction, a national health county, and a national pilot area for the integration and development of primary, secondary and tertiary industries in rural areas in 2018.

In 2020, the local GDP of Dancheng County will reach 33.956 billion yuan, an increase of 2.5%.