Allocasuarina grampiana, commonly known as Grampians sheoak,[3] is a species of flowering plant in the family Casuarinaceae and is endemic to the Grampians National Park in Victoria.

Its branchlets are more or less erect, up to 150 mm (5.9 in) long, the leaves reduced to erect to slightly spreading, scale-like teeth 0.4–0.8 mm (0.016–0.031 in) long, arranged in whorls of six or seven around the branchlets.

[3][4] Allocasuarina grampiana was first formally described in 1989 by Lawrie Johnson in the Flora of Australia from specimens collected by David Eric Symon on the upper slopes of Mount Rosea in 1965.

[5][6] The specific epithet, (grampiana) refers to the Grampians National Park, to where this species is restricted.

[3][4] Allocasuarina grampiana is listed as "endangered" under the Victorian Government Flora and Fauna Guarantee Act 1988.