| Osnaburgh 63A | |
| Official Name: | Osnaburgh 63A Indian Reserve |
| Settlement Type: | Indian reserve |
| Pushpin Map: | Canada Ontario |
| Pushpin Mapsize: | 200 |
| Coordinates: | 51.0667°N -106°W |
| Subdivision Type: | Country |
| Subdivision Type1: | Province |
| Subdivision Type2: | District |
| Subdivision Name2: | Thunder Bay |
| Subdivision Type3: | First Nation |
| Subdivision Name3: | Mishkeegogamang |
| Area Land Km2: | 41.79 |
| Population Footnotes: | [1] |
| Population Total: | 153 |
| Population As Of: | 2011 |
| Population Density Km2: | 3.7 |
| Website: | www.mishkeegogamang.ca |
Osnaburgh 63A is a First Nations reserve on Lake St. Joseph in Thunder Bay District, Ontario. It is one of the reserves of the Mishkeegogamang First Nation, alongside Osnaburgh 63B.
Osnaburgh 63A is made up of three separate areas known as Ace Lake, Eric Lake, Ten Houses.