Ferocactus johnstonianus is a species of Ferocactus found in Mexico[2] Ferocactus johnstonianus is a solitary, spherical to short cylindrical cactus that can grow over 1 meter tall and up to 35 cm (14 in) in diameter.

It has 24 to 31 slightly humped ribs and 22 to 25 golden-yellow, awl-shaped spines that turn brown with age and reach up to 6 cm (2.4 in) long, without differentiating into central and radial spines.

Its fruits, which are about 3 cm (1.2 in) long, sometimes open with a basal pore.

[3] This species is found on Ángel de la Guarda Island in Baja California, Mexico.

It was first described in 1923 by Nathaniel Lord Britton and Joseph Nelson Rose, and the species name johnstonianus honors American botanist Ivan Murray Johnston.