Allium brandegeei is a plant species native to the western United States. It has been reported from western Colorado, Utah, Idaho, eastern Oregon, Park County, Montana and Elko County, Nevada. Allium brandegeei grows in sandy, rocky soil at elevations of . One plant produces 1-5 round to egg-shaped bulbs up to in diameter. Flowers are bell-shaped, up long; tepals white with green or purple midvein. References brandegeei Onions Flora of Colorado Flora of Montana Flora of Idaho Flora of Nevada Flora of Oregon Flora of Utah Plants described in 1882 Taxa named by Sereno Watson