| Canada. Social Insurance Numbers | Toronto |
| Service Canada, Guelph, Service Canada Centre | Guelph |
| Service Canada, Social Insurance Registration Office | Bathurst |
| Service Canada, Service Canada, Mississauga Service Canada Centre | Mississauga |
| Service Canada - Halton Region, Oakville, Federal Government Services | Oakville |
| Service Canada - Halton Region, Burlington, Federal Government Services | Burlington |
| Service Canada - Halton Region, Georgetown, Federal Government Services | Georgetown |
| Service Canada - Halton Region, Milton, Federal Government Services | Milton |
