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Yi Sanhae (; 1539–1609) was Korean politician, scholar, writer and poet of the Joseon period. He served as Chief State Councilor from 1590-1592 and 1600. Yi was a member of the political faction the Easterners and when this split into the Northerners and Southerners, Yi became leader of the Northerners faction. Courtesy name was Yeosu(여수), nickname was Agye(아계, 鵝溪)·Jongnamsuong(종남수옹, 終南睡翁))·Jukpiong(죽피옹, 竹皮翁)·Sichongeosa(시촌거사, 枾村居士).