Swainsona villosa is a species of flowering plant in the family Fabaceae and is endemic to central Australia.

It is a prostrate or ascending plant, with imparipinnate leaves with 7 to 15 egg-shaped leaflets with the narrower end towards the base, and racemes of 2 to 15 usually purple, sometimes pink or white flowers.

Swainsona villosa is a prostrate or ascending plant up to about 20 cm (7.9 in) high with many stems, often with their bases below the surface of the soil.

[2][3][4] Swainsona villosa was first formally described in 1924 by John McConnell Black in the Flora of South Australia from specimens collected in the Musgrave Ranges.

[6] This Swainson-pea grows on sandy or loamy soils on stone and sandplains in the north of South Australia, in the Central Ranges, Finke, Great Sandy Desert, Great Victoria Desert, MacDonnell Ranges, Stony Plains of southern Northern Territory, and the Central Ranges, Gascoyne and Great Sandy Desert bioregions of Western Australia.