Juttadinteria simpsonii is a species of succulent plant in the family Aizoaceae.

Juttadinteria simpsonii is known only from four subpopulations near Lüderitz in the ǁKaras Region of Namibia, 390–606 m (1,280–1,988 ft) above sea level, where it grows on granitic-gneiss ridges, sandy pockets amongst dolomite rocks, low and mid-elevation mountain slopes, and rocky or sandy plains.

[1] Juttadinteria simpsonii is an upright shrub growing to 250 mm (9.8 in) tall with up to 15 branches.

[3][4] Juttadinteria simpsonii is listed as critically endangered by the International Union for the Conservation of Nature under criteria A3d and A4ad, based on the decline of its population due to exploitation.

Though the entire population falls within the boundaries of protected areas, it is frequently poached for the ornamental plant trade.