Coffin Bay National Park is a protected area in on the Eyre Peninsula of South Australia, Australia, which is located about 301 km west of Adelaide and about 46 km west of Port Lincoln. The town of Coffin Bay is near the entrance to the national park. The national park occupies the Coffin Bay Peninsula - a long peninsula with a sheltered bay to its north, coastal dunes, swamps and a coastline which overlooks islands, reefs, limestone cliffs and white surf beaches.

Protected areas of South Australia, consisting of protected areas located within South Australia and its immediate onshore waters and which are managed by South Australian Government agencies. As of 2018, South Australia contained 359 separate protected areas declared under the National Parks and Wildlife Act 1972, the Crown Land Management Act 2009 and the Wilderness Protection Act 1992. Together, they cover a total land area of 211,387.48 km2 (81,617.16 sq mi) or 21.5% of the state's area.