According to the postal code database, the postal code of Yangdong District of Yangjiang City is 529900, with the first two digits 52 representing Guangdong Province and the third digit 9 representing Yangjiang City. The fourth 9 stands for Yangdong District, and the last two 00 stands for the specific delivery area.

Yangdong District is located in the western edge of the Pearl River Delta along the southwest coast of Guangdong Province, and is a municipal district under the jurisdiction of Yangjiang City, Guangdong Province. It borders Taishan City and enping city in the east, Jiangcheng District of Yangjiang City in the west, Yang Chun in the north and Nanhai in the south, with a total area of 1703.03 square kilometers.