William Bay is a national park in
Western Australia (
Australia), 369 km southeast of
Perth.
- Area: 1,734 ha
- Latitude: 35° 01' 35" S
- Longitude: 117° 14' 06" E
- Date of establishment: 1971
- Managing authorities: Department of Conservation and Land Management
- IUCN category: II
See also: Protected areas of Western Australia