Crowea angustifolia is a flowering plant in the family Rutaceae, and is endemic to the south-west of Western Australia.

The leaves are thin, glabrous, linear to broad elliptic, or egg-shaped with the narrower end towards the base.

There are between two and four bracteoles at the base of the flower and five separate sepals which are papery, more or less round and about 2 mm (0.08 in) long.

[2][3][4] Crowea angustifolia was first formally described by James Edward Smith in 1808 from a specimen collected by "Mr Menzies near King George's Sound".

[9] The species is endemic to the extreme south western corner of Western Australia, in the Jarrah Forest, Swan Coastal Plain and Warren biogeographic regions growing on sandy soils, gravel, granite, ridge tops, slopes and outcrops.