List of protected areas of Western Australia

[1][2] Marine-based protected areas in Western Australia, as of 2022, covered 4,751,462 hectares (11,741,120 acres) or 41.05 percent of the state's waters.

[3] Western Australia has had national parks or protected areas under legislation since the early 20th century.

At the time of the 2022 Collaborative Australian Protected Areas Database report, the 110 then-registered national parks covered 6,511,458 hectares (16,090,160 acres) or 2.58 percent of Western Australia's land mass, and accounting for 8.55 percent of all protected areas in the state.

As of 2022, an additional 15 nature reserves exist in Western Australia which are listed on the marine register, consisting exclusively of offshore islands, covering 9,912 hectares (24,490 acres) or 0.09 percent of Western Australia's waters, and accounting for 0.21 percent of all marine protected areas in the state.

Such land may have a wide variety of purposes, but are normally related to recreation, wildlife conservation, infrastructure and historical features.