Linanthus oblanceolatus) is a species of flowering plant in the phlox family known by the common name Sierra Nevada linanthus.

It is endemic to California, where it is known only from a section of the southern Sierra Nevada.

It grows in open meadows of temperate coniferous forest habitats, from 2,800–3,700 metres (9,200–12,100 ft) in elevation.

Leptosiphon oblanceolatus is a small, hairy annual herb producing a thin stem no more than about 12 centimeters tall.

The leaves are each divided into widely lance-shaped lobes up to 1.5 centimeters long.