水源县（Thủy Nguyên），是越南海防市下辖的一个县。白藤江穿过县境。

水源县分为2个市镇，35个社，分别为：

Thủy Nguyên is a rural district (huyện) of Hai Phong, the third largest city of Vietnam. It is told as one of the fastest developing districts in Hai Phong and in the north Vietnam as well. It is now one of the best choice to investigate in Hai Phong and in North Vietnam. Located in the northern of Hai Phong city - the third populous city of Vietnam, Thuy Nguyen has a lot of advantage situation such as