北河县（越南语：Huyện Bắc Hà）是越南北圻地区老街省下辖的一个县，位于山区，气候凉爽，交通闭塞。多少数民族。以其特色少数民族风格的集市和建筑闻名。

越南社会主义共和国老街省行政区划 省辖市 老街市 县 保胜县 保安县 巴刹县 北河县 孟康县 沙坝县 西马街县 文磐县 参阅：越南县级以上行政区列表

Bắc Hà is a rural district of Lào Cai Province in the Northeast region of Vietnam. It is the capital of the region of the Flower Hmong, one of the 54 minorities of Vietnam and of the six groups of Hmong people. It is famous for its Sunday morning market, where thousands of locals gathered, the women dressed in their very intricate handmade costumes (it takes three to five months to embroider one by hand), as well as for the Saturday morning smaller market of Can Cau, 18 kilometres (11 mi) north of Bắc Hà. The town is enjoying an economic boom thanks to tourism, centered on the markets and, more and more, excellent trekking in the mountains north of the town.