Salix barrattiana is a species of flowering plant in the willow family known by the common name Barratt's willow. It is native to North America, where it is distributed across Alaska and western Canada, with also a few populations in Montana and Wyoming. These disjunct populations are probably relics from a time when the climate was colder. The southernmost population is technically in Wyoming, but it is located at the Montana state line and it is limited to one clone of all-staminate plants within an area of in a high-elevation habitat.
This willow is a shrub reaching a maximum height near . It may form dense thickets. The stems are reddish-brown in color and the smaller branches may be purplish. The twigs are sticky with resin and have a coating of hairs. The leaves are up to long and have hairy to woolly undersides. The leaves have a strong "balsamic" scent. The stipules and buds are very oily and will stain a pressing sheet yellow.