Salvia mekongensis (Mekong sage) is a perennial plant native to Yunnan province in China, found growing on hilly grasslands at elevation. S. mekongensis grows on one to five ascending to erect stems, with mostly basal leaves that are usually ovate to oblong-ovate, long and wide.
Inflorescences are 2 flowered verticillasters in terminal racemes or panicles, long. The corolla is yellow and .