Trachylepis gravenhorstii, also known commonly as Gravenhorst's mabuya, is a species of skink, a lizard in the family Scincidae.

The species is endemic to Madagascar.

[2] The specific name, gravenhorstii, is in honor of German zoologist Johann Ludwig Christian Gravenhorst.

[4] The preferred natural habitats of T. gravenhorstii are rocky areas, grassland, shrubland, and forest, but is also found in coffee plantations and ylang-ylang plantations.

[1] T gravenhorstii may attain a snout-to-vent length (SVL) of 7 cm (2.8 in), and a total length (including tail) of 18 cm (7.1 in).