The 1034 Yellow River flood (traditional Chinese: 1034年黃河洪水; simplified Chinese: 1034年黄河洪水; pinyin: 1034 nián huánghé hóngshuǐ)[a] was a natural disaster along China's Yellow River originating in a burst fascine following heavy rainfall at Henglong in the territory of the Northern Song.

The flood divided the Yellow River from its previous course into three more northerly channels meeting the Chihe, You, and Jin.

In order to maintain protection from the heavy annual rains around July, a system of fascines were constructed along much of the river's path in areas controlled by the Northern Song.

During a period of intense rainfall in July 1034, a fascine outside at Henglong burst, causing a massive flow of water from the Yellow River away from the course it had previously followed and been directed into.

Under the rule of Renzong, an emperor known for his modesty, the Song worked for five years futilely attempting to restore the Yellow River's previous course.