Salix lutea is a species of willow known by the common name yellow willow. It is native to North America, including central Canada and parts of the western and central United States, with the exception of the Great Basin. It can be found in moist and wet habitat types, such as riverbanks, meadows, and gullies. It is a shrub up to 7 m tall, sometimes forming colonial thickets or becoming erect and treelike. The lance-shaped leaves may grow over 11 cm long and may have smooth, lightly serrated, wavy, or gland-studded edges. The inflorescence is a catkin of flowers up to 4 or 5 cm long, stout to slender in shape.