| Northwest Angle 33B | |
| Official Name: | Northwest Angle Indian Reserve No. 33B |
| Settlement Type: | Indian reserve |
| Pushpin Map: | Canada Ontario |
| Pushpin Mapsize: | 200 |
| Coordinates: | 49.3833°N -96°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: | 12.78 |
| Population Footnotes: | [1] |
| Population Total: | 86 |
| Population As Of: | 2011 |
| Population Density Km2: | 6.7 |
Northwest Angle 33B is a First Nations reserve in Kenora District, Ontario. It is one of three reserves for the Northwest Angle 33 First Nation.