| Rat Portage 38A | |
| Official Name: | Rat Portage Indian Reserve No. 38A |
| Settlement Type: | Indian reserve |
| Pushpin Map: | Canada Ontario |
| Pushpin Mapsize: | 200 |
| Coordinates: | 49.7°N -130°W |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Type2: | District |
| Subdivision Name2: | Kenora |
| Subdivision Type3: | First Nation |
| Subdivision Name3: | Obashkaandagaang Bay |
| Area Land Km2: | 29.84 |
| Population Footnotes: | [1] |
| Population Total: | 362 |
| Population As Of: | 2011 |
| Population Density Km2: | 12.1 |
Rat Portage 38A is a First Nations reserve on Lake of the Woods in northwestern Ontario. It is one of two reserves of the Obashkaandagaang Bay First Nation.