| Whitefish Bay 33A | |
| Official Name: | Whitefish Bay Indian Reserve No. 33A |
| Settlement Type: | Indian reserve |
| Pushpin Map: | Canada Ontario |
| Pushpin Mapsize: | 200 |
| Coordinates: | 49.3667°N -150°W |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Type2: | District |
| Subdivision Name2: | Kenora |
| Subdivision Type3: | First Nation |
| Subdivision Name3: | Northwest Angle 33 |
| Area Land Km2: | 12.89 |
| Population Footnotes: | [1] |
| Population Total: | 79 |
| Population As Of: | 2011 |
| Population Density Km2: | 6.1 |
Whitefish Bay 33A is a First Nations reserve on Lake of the Woods near Sioux Narrows-Nestor Falls in northwestern Ontario. It is one of three reserves of the Northwest Angle 33 First Nation.