Acacia dietrichiana is a species of flowering plant in the family Fabaceae and is endemic to Queensland in Australia. It is a shrub or tree with narrowly linear phyllodes, spherical heads of bright golden yellow flowers and thinly leathery pods that resemble a string of beads.
Acacia dietrichiana is a sparingly branched shrub or tree that typically grows to a height of up to and has slender, dark reddish brown branchlets. Its phyllodes are narrowly linear, straight to slightly curved, long and wide with a single vein and a gland up to above the base of the phyllode. The flowers are borne in up to three spherical heads in axils on a peduncle long, each head with 20 to 30 bright golden yellow flowers. The pods are thinly leathery, up to long and wide and resemble a string of beads. The seeds are about long and lack an aril.
Acacia dietrichiana was first formally described in 1882 by Ferdinand von Mueller in Southern Science Record from specimens collected by Amalie Dietrich near Lake Elphinstone.
This species of wattle grows in woodland in soils derived from sandstone, and is widespread but uncommon in central Queensland from east of Tambo and along the Great Dividing Range to Lucy Creek (west of Ingham).
Acacia dietrichiana is listed as of "least concern" under the Queensland Government Nature Conservation Act 1992.