This ACT endemic is largely restricted to Black Mountain Sandstone, including Black Mountain, Gossan Hill, Aranda Bushland and Bruce Ridge, with an estimated population of around 1,000 plants. There are small outlying populations on Percival Hill, Gungahlin Hill, Mount Wanniassa and the Majura Firing Range. It is widespread on Black Mountain across a range of fire regimes, though there is a statistically weak but significant association with more frequently burnt areas. It also tends to occur on flatter slopes and is uncommon on steeper areas
Diuris nigromontana is listed in the following regions:
Canberra & Southern Tablelands