Allium altaicum is a species of onion native to Asiatic Russia (Altay, Buryatiya, Zabaykalsky Krai, Irkutsk, Tuva, Amur Oblast), Mongolia, Kazakhstan and northern China (Inner Mongolia, Heilongjiang and Xinjiang).
Allium altaicum produces narrowly egg-shaped bulbs up to in diameter. Scape is round in cross-section, up to tall. Leaves are round, up to long. Flowers are pale yellow, up to across. Ovary is egg-shaped; stamens longer than the tepals.