Zieria southwellii is a plant in the citrus family Rutaceae and is endemic to eastern Australia.

Zieria southwellii is a tall shrub or small tree which grows to a height of 5 m (20 ft).

The flowers are arranged in large numbers in upper leaf axils, the groups usually shorter than the leaves.

Flowering occurs from August to December and is followed by fruits which are mostly glabrous capsules dotted with oil glands.

[1][2] Zieria southwellii was first formally described in 2002 by James Armstrong and the description was published in Australian Systematic Botany.