Dillwynia is a genus of about 20 species of flowering plants in the family Fabaceae, and is endemic to Australia.

The upper two of five sepal lobes are joined in a single "lip", the standard petal is broader than long, and the keel is no longer than the wings.

The stamens are free from each other, the ovary is on a short stalk and the fruit is a more or less sessile pod.

[3][4][5][6] The genus Dillwynia was first formally described in 1805 by James Edward Smith in Annals of Botany.

[7][8] The name Dillwynia honours Lewis Weston Dillwyn "whose scientific labours respecting the genus Conferva, as well as his knowledge in other abstruse parts of botany, merit such a memorial".