This is a list of areas with old-growth forests that have at least 10 acres (4.0 hectares) of old trees. Ecoregion details are from the book Terrestrial Ecoregions of the World.

The terms "old growth" and "virgin" can have different meanings in different places. For more details, refer to the entry on old-growth forests.

Australia

In 1992, Australia created the National Forest Policy Statement (NFPS) to protect old-growth forests. This policy started a process for evaluating forests to determine their conservation value, including old-growth value. A team of state and Australian government agencies used the NFPS definition to create a shared definition accepted by all governments (JANIS 1997).

By 2008, only 15% of Australia’s forests, mostly tall, wet forests, had been assessed for old-growth value. Out of 23 million hectares (57 million acres) of assessed forests, 5 million hectares (12 million acres), or 22%, were classified as old-growth. Nearly half of Australia’s identified old-growth forests are located in New South Wales, mostly on public land. More than 73% of these forests are found in formal or informal nature conservation reserves.

In 2001, Western Australia became the first state in Australia to stop logging in old-growth forests.

In New Zealand, the term "old-growth forests" is rarely used. Instead, the term "The Bush" is used to describe native forests. Large areas of forest cover in New Zealand are protected as conservation areas.