| Canada. Border Services Agency, Border Information Service | Ottawa |
| Canada. Canada Pension Plan, Retirement pension | Toronto |
| Canada. Canada Revenue Agency, Tax Information | Canada |
| Canada. Elections Canada | Gatineau |
| Canada. Global Affairs Canada, Essential Information for Canadian Travellers | Ottawa |
| Canada. Health Canada, Ontario Region, First Nations and Inuit Health Branch | Ottawa |
| Canada. Indigenous Services Canada, Indian Residential Schools Settlement Agreement | Gatineau |
| Canada. Members of Parliament - Halton Region, Burlington North - Milton West Electoral District - Milton Office, Federal Services to Constituencies | Milton |
| Canada. Members of Parliament - Halton Region, Burlington Electoral District - Burlington Office, Federal Services to Constituencies | Burlington |
| Canada. Members of Parliament - Halton Region, Milton East - Halton Hills South Electoral District, Federal Services to Constituencies | Milton |
| Canada. Members of Parliament - Halton Region, Oakville West Electoral District - Oakville Office, Federal Services to Constituencies | Oakville |
| Canada. Members of Parliament - Halton Region, Oakville East Electoral District - Oakville Office, Federal Services to Constituencies | Oakville |
| Canada. Members of Parliament - Wellington County, Wellington-Halton Hills North Electoral District - Fergus Office, Federal Services to Constituencies - Wellington County | Centre Wellington |
| Canada. Office of the Prime Minister | Ottawa |
| Canada. Parks Canada | Gatineau |
| Canada. Veterans Affairs Canada - Toronto, Mississauga Service Centre | Mississauga |
| Service Canada, Service Canada, Mississauga Service Canada Centre | Mississauga |
| Service Canada, Passport Canada | Ottawa |
| 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 |
| Service Canada - Wellington County, Guelph Service Canada Centre, Federal Government Information Lines | Guelph |
| Service Canada Hamilton Locations, Hamilton East Service Canada Centre and Passport Services, Canadian Passport Service | Hamilton |
| Service Canada Hamilton Locations, Hamilton Mountain Service Canada Centre and Passport Services | Hamilton |
| Veteran Affairs Canada, Veterans Affairs Canada, Hamilton District Office | Hamilton |
