| Rainy Lake 26A | |
| Official Name: | Rainy Lake Indian Reserve No. 26A |
| Settlement Type: | Indian reserve |
| Pushpin Map: | Canada Ontario |
| Pushpin Mapsize: | 200 |
| Coordinates: | 48.7333°N -148°W |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Type2: | District |
| Subdivision Name2: | Rainy River |
| Subdivision Type3: | First Nation |
| Subdivision Name3: | Nigigoonsiminikaaning |
| Area Land Km2: | 24.12 |
| Population Footnotes: | [1] |
| Population Total: | 158 |
| Population As Of: | 2021 |
| Population Density Km2: | 6.6 |
| Website: | nigigoonsiminikaaning.ca |
Rainy Lake 26A is a First Nations reserve on Rainy Lake in Rainy River District, Ontario, Canada. It is the main reserve of the Nigigoonsiminikaaning First Nation. The population was 158 in the 2021 census. Languages spoken are given as English and Ojibway in the census.