Echinocereus schmollii is a species of cactus native to Mexico.

[3] The plant has nine to ten rounded, tuberculated ribs and up to 35 pink hair-like thorns that create a woolly appearance, which turn white or darker and can be up to 7 mm (0.28 in) long.

[3] Echinocereus schmollii is found in the Mexican state of Querétaro growing in the Chihuahuan Desert at elevations around 1,660 to 1,890 m (5,450 to 6,200 ft).

[4] First described as Cereus schmollii in 1931 by Wilhelm Weingart, the specific epithet honors German artist and cactus collector Ferdinand Schmoll.

Nigel Paul Taylor reclassified it to the genus Echinocereus in 1985.