Zieria smithii, or Sandfly Zieria, is a shrub native to the coast and ranges of eastern and south-eastern Australia. Leaves have three oblong or lanceolate leaflets, 20–45 mm long and 4–7 mm wide, apex acute. The leaf margins are recurved; strongly aromatic and dotted with oil glands, and warted. Flower inflorescences are shorter than the leaves, with 7–60 flowers. Petals are 2–4 mm long, usually white, and pubescent.