辽河是中华人民共和国东北地区南部的大河，流经河北、内蒙古、吉林、辽宁等省区。干流长1390公里，流域面积（包括浑河、太子河）21.9万平方公里。

辽河有东西两源：正源为西辽河南源的老哈河，发源于河北省平泉县的光头山，西辽河北源西拉木伦河出内蒙古自治区克什克腾旗西南的白岔山，东辽河源出吉林省东辽县萨哈岭；东、西辽河在辽宁省昌图县古榆树附近汇合后称辽河。

The Liao River (simplified Chinese:辽河; traditional Chinese:遼河; pinyin:Liáo Hé; Jyutping:liu4ho4) is the principal river in southern Northeast China, and one of the seven main river systems in mainland China. The province of Liaoning and the Liaodong Peninsula derive their names from this river. The river is also popularly known as the "mother river" in Northeast China. Coursing 1,345 kilometres (836 mi) long, the Liao River system drains an catchment basin of over 232,000 square kilometres (90,000 sq mi), but its mean discharge is quite small at only about 500 cubic metres per second (18,000 cu ft/s), about one-twentieth that of the Pearl River. The Liao River has an exceedingly high sediment load because many parts of it flow through powdery loess.