Allium peninsulare is a North American species of wild onion.

[1] It is known by such common names as Mexicali onion and Peninsula onion; the former referring to the Mexican city just south of the US/Mexican border, the latter referring to the Peninsula of Baja California.

The range extends south into the northernmost part of Baja California and north into southern Oregon.

[3][4] Allium peninsulare is usually found in valley grassland, foothill woodland, and coastal chaparral, at elevations up to 1100 m (3660 feet).

The plant produces a bulb 8–15 mm wide and has two to three channeled to more or less cylindrical leaves.