Mimosa Rocks National Park, Coastal nature reserve in Bega Valley, Australia.

Mimosa Rocks National Park is a coastal nature reserve in New South Wales, made up of rocky beaches, lagoons, and tall stone formations that rise directly from the shore. The park is divided into several separate sections, each accessible through its own entry point along the coast.

Mimosa Rocks National Park was declared on 13 April 1973. In 1999 a further 105 hectares were added, subdivided from the Murrah Gardens Estate owned by the Hammond family, taking in the Bunga Beach and Goalen Head coastline. The park begins at the northern end of Tathra Beach and runs about 16 km north, with Bournda National Park adjoining it to the south.

The park lies within the country of the Yuin people. A recommended walking route in the park is presented as a way to learn about the cultural heritage of Aboriginal people, so the walk itself is the main way a visitor meets that history on the ground.

The park runs about 16 km north from the northern end of Tathra Beach, with five access roads off the Tathra–Bermagui road. Four campsites — Gillards, Middle Beach, Aragannu and Picnic Point — each have barbecues and non-flush toilets. The terrain averages 69 metres above sea level.

The park's name comes from the Mimosa, a ship that gave the coastline its label, though the sources record no date or wreck site. The park was declared on 13 April 1973, and in 1999 about 105 hectares were added from the Murrah Gardens Estate, including Bunga Beach and Goalen Head. The average elevation of the terrain is 69 metres above sea level.