海带属（学名：Laminaria）是褐藻纲海带目海带科之下的一个属，其下有31个品种，包括我们日常所吃的海带、昆布、鹅掌菜等多个品种。海带属物种的共同特征为相对其他物种较大、长而像皮革的带状的体形，经济价值极高。

海带属物种可于北太平洋及北大西洋发现，一般生活于海深约八米到30米的浅海床；不过在温暖的地中海及巴西外海海床，即使在水深约120米，仍然有本属物种生活。

海带属物种在商业养殖业里有相当大的比例是用于提取其海带素、碘质及岩藻多糖等成分，又或生产褐藻糖胶、甘露醇（Mannitol，商品名称美立妥）等药物。这些成分在工业上有很广泛的用途。在南韩，海带属物种被用于制作素肉、大菜糕及蜜醆。现时海带产品在全球最大的生产国是中华人民共和国。

Laminaria is a genus of 31 species of brown algae commonly called "kelp". Some species are also referred to as tangle. This economically important genus is characterized by long, leathery laminae and relatively large size. Some species are referred to by the common name Devil's apron, due to their shape, or sea colander, due to the perforations present on the lamina. It is found in the north Atlantic Ocean and the northern Pacific Ocean at depths from 8 to 30 m (26 to 98 ft) (exceptionally to 120 m (390 ft) in the warmer waters of the Mediterranean Sea and off Brazil).