Drosera darwinensis is a sundew in the section Lasiocephala (Petiolaris complex). It is named for the city of Darwin where it grows.

Drosera darwinensis is a small sundew with rosettes that reach 3-5 cm in diameter. The leaves are flat lyring, with an expanded petiole and ocal shaped lamina. The flower scapes are short, reaching 5-15 cm in height. The flowers are pendulous in fruit and the anthers lack a hooked tip at their extremity.

The species grows in well drained habitat around Darwin in the Northern Territory. These habitats are typically on gravelly hills that are kept moist by rain during the wet season. It also readily colonises roadside embankments.

Drosera darwinensis is morphologically similar to D. brevicornis, which shares the same overall rosette shape. In nature, it is readily distinguished by its smaller proportions (D. brevicornis is a larger plant with rosettes that typically reach 5-10cm in diameter and scapes that exceed 30cm in height). The tips of the anthers do not have a hooked appendage in D. darwinensis.