Acacia linarioides is a shrub belonging to the genus Acacia and the subgenus Juliflorae that is native to north Australia.
The shrub typically grows to a maximum height of and has a spreading and resinous habit. It has dark grey coloured bark that has a smooth texture and glabrous angular branchlets. Like most species of Acacia it has phyllodes rather than true leaves. It blooms between January and July producing golden flowers. The cylindrical flower-spikes are found singly in the axils and have a length of and are packed with golden coloured flowers. The curved and twisted seed pods that form after flowering are constricted between and raised over the seeds. The pods have a length of and a width of with longitudinally arranged seeds inside. The brown-black coloured seeds have a narrowly oblong-elliptic shape with a length of and have a closed areole.
It is endemic to the top end of the Northern Territory and on a few of the islands in the Gulf of Carpentaria where it is found in crevices and on plateaux, alongside creeks and among rocks in thin sandy sandstone based soils.