Amanita prairiicola is an American fungus. Its cap is white, 6–20 centimetres (2 1⁄2–8 inches) across, and usually flat to convex. The gills are a cream to gold hue, free, crowded, and broad. The stalk is 15–20 by 2–4 cm (6–8 by 1–1 1⁄2 in), and is also cream colored.
The species is native to western North America from Oregon to Arizona and eastward to Kansas. One specimen has been described in Argentina, though it may have been imported with soil. Unlike most Amanita species, it does not appear to need a mycorrhizal host and has been found in areas with no potential for a host, such as open cultivated fields and deserts.
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