Nanhai (Chinese: 南海; lit. 'South Sea') may refer to:

• Nanhai, the Chinese name for the South China Sea, one of the Four Seas
• Nanhai Commandery, the former Chinese administration over Liangguang
• Nanhai, the Chinese name for the South China Sea Islands
• The Nanhai I, a Chinese wreck from the Southern Song dynasty raised in 2007
• Nanhai, a lake in the Zhongnanhai complex in Beijing
• Nanhai Academy, a collection of cultural and educational facilities located on Nanhai Road in Taipei, Taiwan
• Nanhai District, Foshan, Guangdong
• Nanhai, Hubei (zh), town in Songzi, Hubei
• Nanhai Township (zh), subdivision of Pingtan County, Fujian
• Nanhai Subdistrict, Maoming (zh), in Maogang District, Maoming, Guangdong
• Nanhai Subdistrict, Zhumadian (zh), in Yicheng District, Zhumadian, Henan

• South Sea (disambiguation)
• Nankai (disambiguation)
• Donghai (disambiguation) ("East Sea")
• Beihai (disambiguation) ("North Sea")
• Xihai (disambiguation) ("West Sea")
• Namhae (disambiguation), the Korean cognate of Nanhai

This disambiguation page lists articles associated with the title Nanhai.
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