Dillwynia rupestris is a species of flowering plant in the family Fabaceae and is endemic to the Gibraltar Range National Park in New South Wales.

It is an erect, single-stemmed shrub with linear leaves and yellow flowers with red markings.

Flowering occurs from mid-September to early October and the fruit is an oval pod 4.5–6.0 mm (0.18–0.24 in) long.

[4] The specific epithet (rupestris) means "rocky", referring to the preferred granite habitat of this species.

[3] This dillwynia grows in shrubland, forest or heath and is only known from the Gibraltar Range National Park.