Yi River may refer to:
Yí River, river in Uruguay, tributary of Río Negro Yishui River (宜水 or 宜水河), a right-bank tributary of the middle Xiang River Yi River (Henan) (伊河), China Yi River (Hebei) (易水), China, flowing through Yi County, Hebei Yi River (Shandong) (沂河), China, flowing through Linyi