Allium semenovii is an Asian species of wild onion native to Xinjiang, Kazakhstan, Tajikistan, and Kyrgyzstan. It grows at elevations of 2000–3000 m.

Allium semenovii has bulbs up to 15 mm in diameter. Scapes are up to 50 cm tall. Leaves are flat, up to 15 mm wide. Umbels are speherical, densely crowded with many yellow flowers.