Yangxi County is under the jurisdiction of Yangjiang City, Guangdong Province. It is located in the southwest of Guangdong Province, west of Yangjiang City. The total area is 1435 square kilometers. In 2021, Yangxi County will have a total registered residence population of 557900, a permanent population of 436600, and 23 ethnic minorities. As of June 2020, Yangxi County has 8 towns under its jurisdiction, and the county government is located at Square Road, Zhixi Town.

Yangxi County is named for its location in the west of Moyang River basin. In 1988, Yangjiang was removed from the county and built into a city, and Yangjiang County was divided into Yangxi County, Jiangcheng District and Yangdong District.

In 2021, Yangxi County's GDP will reach 24.41 billion yuan, up 8.5%; Investment in fixed assets was 34.3 billion yuan, up 147.7%; The added value of industries above designated size was 6.48 billion yuan, up 28.3%; Infrastructure investment was 30.41 billion yuan, up 206.3%; The project investment was 32.07 billion yuan, up 191%.