Populus angustifolia, commonly known as the narrowleaf cottonwood,[2] is a species of tree in the willow family (Salicaceae).

It is native to western North America, where it is a characteristic species of the Rocky Mountains and the surrounding plains.

[3] It ranges north to the provinces of Alberta and Saskatchewan in Canada and south to the states of Chihuahua, Coahuila, and Sonora in Mexico.

[3] The buds are sticky and gummy and were enjoyed as a sort of chewing gum by local Native American peoples, including the Apache and Navajo.

The tree is the host species of the sugarbeet root aphid (Pemphigus betae).