Jacksonia rubra is a species of flowering plant in the family Fabaceae and is endemic to the south-west of Western Australia. It is a prostrate, spreading or scrambling, tufted shrub with greyish-green to mid-green branches, densely hairy branchlets, the leaves reduced to dark brown, toothed, egg-shaped scales, deep orange-red flowers scattered along the branches, and membranous, elliptic pods.
Jacksonia rubra is a prostrate, spreading or scrambling, tufted shrub that typically grows up to high and wide. It has greyish-green to mid-green branches, its leaves reduced to egg-shaped, dark brown scales, long and wide. The flowers are scattered along the branches on a pedicel long, with egg-shaped bracteoles long and wide with toothed edges. The floral tube is long and the sepals are membranous, with lobes long, wide and fused for . The petals are deep orange-red, the standard petal long and deep, the wings long, and the keel long. The stamens have green filaments, long. Flowering occurs from August to November, and the fruit is a membranous, densely hairy elliptic pod long and wide.
Jacksonia rubra was first formally described in 2007 by Jennifer Anne Chappill in Australian Systematic Botany from specimens collected near Pontifex Road, east of Kellerberrin in 1992. The specific epithet (rubra) means 'red'.
This species of Jacksonia grows in heathland, on sand over laterite in three populations near Badgingarra, Tammin and Yarding in the Avon Wheatbelt and Geraldton Sandplains bioregions of western Western Australia.
Jacksonia rubra is listed as "Priority Two" by the Western Australian Government Department of Biodiversity, Conservation and Attractions, meaning that it is poorly known and from only one or a few locations.