Bactra optanias is a species of moth of the Tortricidae family. It is found in Papua New Guinea, Australia (Queensland, Norfolk Island), New Zealand, Java, Tahiti, Sri Lanka, New Caledonia, the Caroline Islands, the southern Mariana Islands, Rapa Iti and Micronesia.
The wingspan is 16–20 mm. The forewings are whitish brown or brown, with numerous fine oblique fuscous costal strigulae (fine streaks) and some fuscous dorsal dots, as well as a fuscous terminal line. The hindwings are whitish, with slight greyish suffusion on the terminal edge.