Swainsona vestita is a species of flowering plant in the family Fabaceae and is endemic to central-northern South Australia.

It is an erect or ascending perennial plant with imparipinnate leaves with about 7 narrowly lance-shaped leaflets, and racemes of 5 to 20 purple flowers.

Swainsona vestita is an erect or ascending perennial plant that typically grows to a height of up to about 25 cm (9.8 in), and has many strongly ridged stems.

[2] Swainsona vestita was first formally described in 1993 by Joy Thompson in the journal Telopea from specimens collected west of Coober Pedy in 1980.

[2] This species of pea grows on open, stony plains with shrubs and grasses in a small area of central-northern South Australia.