Micromyrtus littoralis is a species of flowering plant in the myrtle family, Myrtaceae and is endemic to south-eastern Queensland. It is a shrub with small, overlapping egg-shaped to lance-shaped leaves, and small white flowers arranged singly in leaf axils with 5 stamens in each flower.
Micromyrtus littoralis is a shrub that typically grows to a height of and has grey bark. Its leaves are overlapping, egg-shaped to lance-shaped, long, wide and sessile or on a petiole up to long. The leaves are , have prominent oil glands, and the lower surface is keeled. The flowers are wide and arranged singly in leaf axils on a peduncle long, with 2 bracteoles about long at the base, but that fall off as the flowers open. There are 5 sepals lobes long, and 5 elliptic white petals and wide. There are 5 stamens, the filaments long. Flowering has been recorded throughout the year.
Micromyrtus littoralis was first formally described in 1997 by Anthony Bean in the journal Austrobaileya from specimens collected halfway between Bundaberg and Childers by Stanley Thatcher Blake in 1963. The specific epithet (littoralis) means "pertaining to the sea-shore".
This species of micromyrtus grows in coastal wallum in Queensland, between Bundaberg and Cooloola National Park.