Bournda National Park, Nature reserve in Bega Valley, Australia.

Bournda National Park is a nature reserve in southern New South Wales featuring coastal forests, wetlands, and sand dunes in varied terrain. The park protects diverse habitats that support native Australian wildlife and vegetation across its landscape.

The area was a State Recreation Area from 1947 before being declared Bournda National Park on 24 April 1992, now managed by the NSW National Parks and Wildlife Service. The adjoining Bournda Nature Reserve, established in 1972 and covering 6,088 hectares, is included with the park in a single management plan.

The park lies within the Ulladulla to Merimbula Important Bird Area, identified by BirdLife International for its importance to swift parrots. Its three water bodies shape how visitors use the place: Wallagoot Lake last opened to the ocean in June 2008, Bondi Lake is the region's closest freshwater lake to the sea, and Bournda Lagoon is a brackish lagoon popular with locals and campers for swimming.

Walking tracks run from Hobart Beach to Bournda Lagoon (2.6 km), Scotts Bay (1.3 km) and Tathra via the Kangarutha Track (12 km); a 6 km loop circles Bournda Lagoon past Bournda Island. Camping is at the Hobart Beach campground. The park begins at Kianinny Bay south of Tathra and runs about 13 km south, 343 km from Sydney.

Bondi Lake is the freshwater lake closest to the ocean in the region, which gives it ecological importance. The park also lies within the Ulladulla to Merimbula Important Bird Area, listed by BirdLife International for its value to swift parrots.