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.

The Eyre Peninsula is a triangular peninsula in South Australia. It is bounded by the Spencer Gulf on the east, the Great Australian Bight on the west, and the Gawler Ranges to the north.