Hardenbergia comptoniana is a species of flowering plant in the pea family, Fabaceae, native to Western Australia.

[4] The pea-shaped flowers appear from August to November (Southern Hemisphere late winter to spring) and can range in colour from mauve, to purple to dark blue, with pink and white forms also known.

[5] Henry Cranke Andrews described this species as Glycine comptoniana, naming it for the Lady Northampton as it was in her garden that a specimen had flowered;[6] her surname was Compton.

[4] Hardenbergia comptoniana is found on the coastal plain from Geraldton to Albany in Western Australia, on sand dunes, limestone areas and sandplains.

[4] It is capable of growing high into surrounding trees or can cover fences or trellises rapidly, once established.