杞柳（学名：Salix integra）是杨柳科柳属的植物。

落叶丛生灌木；黄绿色或带紫色树枝；单叶通常对生或近对生，倒披针形有细锯齿；早春先叶开花，雌雄异株，柔荑花序接近无柄，常弯曲；小蒴果无柄有毛。

Salix integra (Chinese: 杞柳 qi liu; Japanese: イヌコリヤナギ inukoriyanagi ; syn. S. multinervis Franch. & Savatier) is a species of willow native to northeastern China, Japan, Korea and Primorsky Krai in the far southeast of Russia.

It is a deciduous shrub growing to 2–6 m tall with greyish-green bark and reddish to yellowish shoots. The leaves are 2–10 cm long and 1–2 cm wide; they are pale green both above and below, and unusually for a willow, are often arranged in opposite pairs or whorls of three, rather than alternate. The flowers are produced in small catkins 1-2.5 cm long in early spring; they are brownish to reddish in colour. It is dioecious, with male and female catkins on separate plants.