Seisia is an area north of New Mapoon and west of Bamaga at the tip of Cape York Peninsula in Queensland, Australia. At the 2006 census, Seisia had a population of 165. Seisia Island Community lies within a small DOGIT area granted in 1986 by the Queensland Government at Red Island Point. The community has a permanent population of about 100 people and is situated at the most northerly deep-water port on Cape York Peninsula. Seisia is popular as a destination for anglers and a number of fishing charter operators use Seisia as their base. A campground at Seisia is utilized by about 50 per cent of camping travelers to Northern Cape York Peninsula.