Acacia alexandri is a species of flowering plant in the family Fabaceae and is endemic to the Cape Range in the north-west of Western Australia.

[2][3][4] Acacia alexandri was first formally described in 1992 by Bruce Maslin in the journal Nuytsia from specimens he collected in the Cape Range in 1988.

[4][5] The specific epithet (alexandri) honours Alex George, who discovered the species in 1960.

[4] This species of wattle is endemic to the Cape Range in the Gascoyne region of Western Australia[6] around Cape Range where it is found on rocky limestone hillsides as part of mallee shrubland communities growing in rocky, pink loamy soils.

[2] Acacia alexandri is listed as Priority Three by the Government of Western Australia Department of Parks and Wildlife,[6] meaning that it is poorly known and known from only a few locations but is not under imminent threat.