- 中南海 Zhōngnánhǎi ZhongnanhaiZhongnanhai, a palace complex adjacent to the Forbidden City, now serving as the central headquarters for the Communist Party of China and the State Council.
- 南海区 Nánhǎi Qū Nanhai DistrictNanhai, a district of Foshan City, Guangdong
- 南海子 Nán Hǎizi NanhaiziPlace name referring to various locations, including Cao Hai, Nan Yuan, and the Nanhaizi Wetland in Baotou, Inner Mongolia
- 南海舰队 Nánhǎi Jiànduì South Sea Fleet