Donghai (East Sea) may refer to:
China East China Sea, also known as Donghai from its Chinese name (东海), a marginal sea east of China East Sea (Chinese literature), one of the Four Seas, a literary name for the boundaries of China Donghai County (东海县), of Lianyungang, Jiangsu Donghai Island (东海岛), island in Zhanjiang, Guangdong Donghai Subdistrict () Donghai Subdistrict, Quanzhou, in Fengze District, Quanzhou, Fujian Donghai Subdistrict, Lufeng, Shanwei, Guangdong Donghai Subdistrict, Jixi, in Chengzihe District, Jixi, Heilongjiang Donghai Subdistrict, Tianjin, in Hexi District, Tianjin Towns named Donghai (东海镇) Donghai, Putian County, Fujian Donghai, Jidong County, Heilongjiang Donghai, Qidong, Jiangsu Donghai Commandery, historical commandery in present-day Shandong and Jiangsu
Vietnam Đông Hải District, in Bac Lieu Province, Vietnam
Astronomy The Chinese name of the star Eta Serpentis
See also East Sea (disambiguation) Nanhai (disambiguation) ("South Sea") Beihai (disambiguation) ("North Sea") Xihai (disambiguation) ("West Sea") 東海 (disambiguation), the East Asian script for "East Sea" Donghae (disambiguation), Korean romanization Tōkai (disambiguation), Japanese romanization Tunghai (disambiguation), Wade–Giles romanization