The Ord Victoria Plain, an interim Australian bioregion, is located in the Northern Territory and Western Australia, comprising 12,540,703 hectares (30,988,750 acres).

Mammals include the large common wallaroo, northern nail-tail wallaby (Onychogalea unguifera), and the long-tailed planigale which is the smallest marsupial in the world.

Mammals that have become depleted or disappeared from these grasslands include the bilby (Macrotis lagotis), northern quoll (Dasyurus hallucatus) and golden bandicoot (Isoodon auratus).

Birds include Australian bustards, singing bushlark, and red-backed fairy-wren while there are important populations of purple-crowned fairywren (Malurus coronatus) along the rivers especially the Victoria.

Some damage results from intensive cattle ranching leading to overgrazing and disrupting the traditional Aboriginal fire regimes in which the grasslands are systematically burnt and allowed to regenerate.