Fangchenggang (防城港; Pinyin: Fángchénggǎng ) is a city in the south of Guangxi Zhuang Autonomous Region in the People's Republic of China.
The prefecture-level city Fangchenggang is made up of two districts, an independent city and a county. These are:
- Municipality Gangkou -港口 区Gǎngkǒu Qū;
- Municipality Fangcheng -防 城区Fangcheng Qū;
- City Dongxing -东兴 市Dongxing Qū;
- Circle Shangsi -上思 县Shangsi Xiàn.