Nanhai (南海) may refer to:
- South China Sea, also known as Nanhai, part of the Pacific Ocean
- Nanhai Islands, islands on the South China Sea
- Nanhai One, Chinese merchant ship which sank off the south China coast during the Southern Song Dynasty
- Nanhai Academy, collection of cultural and educational facilities located on Nanhai Road in Taipei, Taiwan
Read more about Nanhai: People's Republic of China