海山, meaning "sea (and) mountain", may refer to:
Hai San Secret Society, 19th-century organisation based in Penang One of the Chinese names of Külüg Khan, third Emperor of China's Yuan Dynasty Haishan metro station, Taipei Rapid Transit System, Taiwan Haishan Subdistrict, a subdistrict of Yantian District, Shenzhen, China Haishan, a subdivision of Jiefang Subdistrict, Zhoushan, China Miyama, Mie, former town in Japan Montane Mansion (海山樓), in Hong Kong