Allocasuarina lehmanniana, commonly known as dune sheoak, is a shrub in the family Casuarinaceae. Endemic to Western Australia, it is widespread along on the coast from the Murchison River south to Israelite Bay. Dune Sheoak was first collected in 1840 by Johann Priess. The specific name lehmanniana honours the botanist Johann Lehmann. There are two subspecies: Allocasuarina lehmanniana subsp. ecarinata and Allocasuarina lehmanniana subsp. lehmanniana.