Rinzia sessilis is a plant species of the family Myrtaceae endemic to Western Australia. The spreading shrub typically grows to a height of 0.25 to 0.8 metres (0.8 to 2.6 ft). It blooms in September producing pink-white flowers. It is found on undulating flats and low ridges in the southern Wheatbelt and Goldfields-Esperance regions of Western Australia where it grows in sandy-clay or loamy soils with gravel.