Salix babylonica (Babylon willow or weeping willow) is a species of willow native to dry areas of northern China.
Salix babylonica is a medium- to large-sized deciduous tree, growing up to 20–25m tall. It grows rapidly, but has a short lifespan, between 40 and 75 years. The shoots are yellowish-brown, with small buds. The leaves are alternate and spirally arranged, narrow, light green, 4–16cm long and 0.5–2cm broad, with finely serrate margins and long acuminate tips; they turn a gold-yellow in autumn. The flowers are arranged in catkins produced early in the spring; it is dioecious, with the male and female catkins on separate trees.