Biamanga National Park, Nature reserve in Bega Valley Shire Council, Australia.

Biamanga National Park is a nature reserve featuring wet sclerophyll forests, woodlands, and heathlands across New South Wales. The land covers roughly 13,600 hectares of diverse vegetation situated south of Sydney.

Logging operations shaped the land until the 1970s, when community efforts led to its official protection. The park was formally established with its current status in 1994.

The park is named after Biamanga, a Yuin elder known as King Jack Mumbulla, honoring his legacy and leadership. The land holds many sites sacred to the Yuin people and remains central to their connection with this country.

The park is reached by an unsealed road; the Princes Highway runs west of the park and the Brago River bounds it to the southwest. Picnic and barbecue areas are at the Mumbulla Creek cataract. The Bermaguee Nature Reserve adjoins the park to the northeast.

The park forms part of the Ulladulla to Merimbula Important Bird Area, identified by BirdLife International for its importance to swift parrots. Azure kingfishers and superb fairywrens also live in the park.