Swainsona stenodonta is a species of flowering plant in the family Fabaceae and is endemic to the north-west of Western Australia.

It is an erect annual herb, with imparipinnate leaves with 7 to 13 narrowly linear or oblong leaflets, and racemes of up to 30 or more dark brownish-red to dark purple flowers.

[2][3] Swainsona stenodonta was first formally described in 1879 by Ferdinand von Mueller in his Fragmenta Phytographiae Australiae from specimens collected near the junction of the Sherlock and Yule Rivers by John Forrest.

[4][5] The specific epithet (stenodonta) means "narrow tooth", referring to the sepal lobes.

[6] This species of pea grows in stony soils near watercourses, sandstone rocks and plains in the Pilbara bioregion of northern Western Australia.