Crowdy Bay National Park, Nature reserve in Mid-Coast Council, Australia.

Crowdy Bay National Park stretches from Dunbogan and Laurieton in the north to Crowdy Head and Harrington in the south, protecting long beaches and the heathland behind them. Its best-known feature is Diamond Head, a headland of rocky outcrops overlooking the coast.

John Oxley explored the Crowdy Bay area in 1818. The national park now stretches from Dunbogan and Laurieton in the north to Crowdy Head and Harrington in the south. In November 2019, bushfires destroyed 12,000 hectares of the park, including patches of coastal rainforest and the hut where author Kylie Tennant had lived.

The park's best-known cultural landmark was Kylie's Hut, the retreat of Australian writer Kylie Tennant, which stood in the park until bushfires destroyed it in November 2019. The German source records that the hut could be visited before the fire. The park lies between Dunbogan and Laurieton in the north and Crowdy Head and Harrington in the south.

The park is open year-round, though the warmer months offer the most comfortable visiting conditions. Several camping areas with basic facilities are located near the beaches, and walking trails are clearly marked throughout the site.

The writer Kylie Tennant lived for a time in a hut at Crowdy Bay, which visitors could see until November 2019, when bushfires destroyed it along with 12,000 hectares of the park, including pockets of coastal rainforest.