Iluka Nature Reserve, Nature reserve in Northern Rivers region, New South Wales, Australia.

Iluka Nature Reserve is a protected coastal nature area in northern New South Wales covering about 135 hectares. It is home to one of the last surviving littoral rainforests in the Southern Hemisphere, with a mix of coastal and tropical plants that grow nowhere else in the region.

The reserve received official protection in 1976 and gained UNESCO World Heritage status ten years later as part of the Gondwana Rainforests of Australia. This recognition highlighted the region's global importance for biodiversity and natural science.

The rainforest around Iluka was used for recreation from 1916. In the early 1960s a dispute between conservation and commercial interests led the government in 1964 to protect large parts of the area while allowing sand mining nearby. In the 1990s local residents' own initiatives stopped invasive herb plants from spreading and threatening the reserve's World Heritage listing.

The reserve is accessible via well-marked walking trails that wind through the rainforest and coastal areas. Visitors should wear comfortable shoes and bring protection against moisture and insects common in this tropical setting.

The reserve protects the largest coastal rainforest in New South Wales, and its plant list ranges from dune species to tropical rainforest trees such as tuckeroo, riberry and figs. More than 140 bird species have been recorded, among them the eastern whipbird and the yellow-naped figbird.