Osbornia is a monotypic genus of mangrove in the myrtle family Myrtaceae. The sole species is Osbornia octodonta, commonly known as the myrtle mangrove, which inhabits coastal areas of Borneo, the Philippines, the Lesser Sunda Islands. the Northern Territory, Queensland, and northern Western Australia. It was first described in 1862 by Ferdinand von Mueller, based on material collected in Trinity Bay. who published the description in his tome Fragmenta Phytographiæ Australiæ. It is usually found on the landward side of mangrove forests.

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