Six new species of the genus Nassarius Duméril, 1805 are described, based on material collected from the Coral Triangle and the South Pacific. We combine traditional morphology-based descriptions with the molecular (Cytochrome c oxidase I - COI) signature of the new species. New species are: Nassarius ocellatus sp. nov. (Philippines to Vanuatu), Nassarius houbricki sp. nov. (Solomon Islands to Queensland and Tonga), Nassarius radians sp. nov. (Philippines to Vanuatu), Nassarius vanuatuensis sp. nov. (Vanuatu), Nassarius velvetosus sp. nov. (Western Australia to Fiji) and Nassarius martinezi sp. nov. (Solomon Islands to Tonga).