Kuandian Manchu Autonomous County is subordinate to Dandong City, Liaoning Province. It is located in the southeast of Liaoning Province, along the Yalu River. It faces the Democratic People's Republic of Korea across the river in the east, borders Dandong City in the south, Fengcheng City and Benxi Manchu Autonomous County in the west, and Huanren Manchu Autonomous County and Ji'an City, Jilin Province in the north. It is the county with the largest administrative area at the county level in Liaoning Province and the largest border county in Liaoning Province. The total area is 6193 square kilometers. According to the data of the seventh population census, as of 00:00 on November 1, 2020, the permanent population of Kuandian Manchu Autonomous County is 334636.

Kuandian Manchu Autonomous County has been successively rated as "National Leisure Agriculture and Rural Tourism Demonstration County", "China's Most Beautiful Ecotourism County", and "Liaoning Ecotourism Experimental Area".

In 2019, Kuandian Manchu Autonomous County achieved a GDP of 9.57 billion yuan, an increase of 4.4% over the previous year at comparable prices. Among them, the added value of the primary industry was 2.48 billion yuan, up 3.8%; The added value of the secondary industry was 2.68 billion yuan, up 1.1%; The added value of the tertiary industry was 4.41 billion yuan, up 7%. The proportion of the added value of the three industries in the total output value of the county is 25.9:28:46.1