Lechenaultia stenosepala, commonly known as narrow-sepaled leschenaultia,[2] is a species of flowering plant in the family Goodeniaceae and is endemic to the south-west of Western Australia.

Lechenaultia stenosepala is an open, more or less erect perennial herb or shrub that typically grows to a height of 50 cm (20 in) and often forms suckers.

[2][3] Lechenaultia stenosepala was first formally described in 1964 by Ernst Georg Pritzel in the Botanische Jahrbücher für Systematik, Pflanzengeschichte und Pflanzengeographie from specimens collected near Dandaragan.

[6] Narrow-sepaled leschenaultia grows in low, open heath between Three Springs and Gingin in the Avon Wheatbelt, Geraldton Sandplains, Jarrah Forest and Swan Coastal Plain biogeographic regions of south-western Western Australia.

[2][3] This leschenaultia is listed as "not threatened" by the Government of Western Australia Department of Biodiversity, Conservation and Attractions.