Acacia aprepta is a spreading tree that typically grows to a height of up to 10 m (33 ft) and has dark, furrowed bark.

The flowers are borne in up to 3 spikes 6–35 mm (0.24–1.38 in) long in the axils of phyllodes and are yellow.

[2][3][4] Acacia aprepta was first formally described in 1974 by Leslie Pedley in Contributions from the Queensland Herbarium.

[4][5] This species of Acacia grows in thickets or dense populaions in the western parts of the Darling Downs and around Maranoa, where it grows in shallow gravelly or loamy sandy soils often over sandstone.

[2][3] Acacia aprepta is listed as of "least concern" under the Queensland Government Nature Conservation Act 1992.