| CAAN | |
| Calea | Mississauga |
| Calvary Burlington | Burlington |
| Calvary Chapel Oakville | Oakville |
| CAMA Woodlands, Long Term Care Home | Burlington |
| Campbellville Pharmacy, Pharmacy Services | Milton |
| Canada Council for the Arts | Ottawa |
| Canada. Canada Border Services Agency - Niagara Region, Border Information Service | Ottawa |
| Canada. Canada Pension Plan, Old Age Security | Toronto |
| Canada. Canada Pension Plan, Retirement pension | Toronto |
| Canada. Canada Revenue Agency, Tax Information | Canada |
| Canada. Canada Revenue Agency, Registered Disability Savings Plan (RDSP) | |
| Canada. Canada Revenue Agency, Canada Revenue Agency Hamilton Tax Office, Hamilton Tax Services | Hamilton |
| Canada. Canada Revenue Agency, Canadian Dental Care Plan | Ottawa |
| Canada. Canada Revenue Agency, Toronto Region, Taxes and benefits, Toronto Region | Toronto |
| 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. Health Canada, Cannabis in Canada | Ottawa |
| Canada. Indigenous Services Canada, Indian Residential Schools Resolution Health Support Program (IRSRHSP) | Gatineau |
| Canada. Indigenous Services Canada, Indian Residential Schools Settlement Agreement | Gatineau |
| Canada. Library and Archives Canada, Ottawa | Ottawa |
| 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 | Georgetown |
| 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. National Defence, Canadian Forces Member Assistance Program | Ottawa |
| Canada. Office of the Prime Minister | Ottawa |
| Canada. Parks Canada | Gatineau |
| Canada. Parliament of Canada, Ottawa, Visitor Information | Ottawa |
| Canada. Veterans Affairs Canada - Toronto, Bureau of Pensions Advocates, Toronto - Scarborough | Toronto |
| Canada. Veterans Affairs Canada - Toronto, Mississauga Service Centre | Mississauga |
| Canada. Veterans Affairs Canada - Toronto, Office of the Veterans Ombud | Toronto |
| Canada. Veterans Review and Appeal Board, Charlottetown | Charlottetown |
| Canadian Academy of Dental Health and Community Sciences - Division of the Canadian Academy of Dental Hygiene, Dental Hygiene Clinic | Mississauga |
| Canadian Alliance of British Pensioners | Toronto |
| Canadian Anti-Fraud Centre | North Bay |
| Canadian Association of the Deaf | Ottawa |
| Canadian Automobile Association, South Central Ontario - Burlington Office | Burlington |
| Canadian Automobile Association, South Central Ontario - Oakville Office | Oakville |
| Canadian Breast Cancer Network | Ottawa |
| Canadian Cancer Society for Hamilton, Brant-Norfolk Community, Wheels of Hope Transportation Services | Hamilton |
| Canadian Cancer Society - Ontario Division, Breast Cancer Support and Information Team | Toronto Downtown North |
| Canadian Cancer Society - Ontario Division, Cancer Information Service | Toronto Downtown North |
| Canadian Cancer Society - Ontario Division, Smokers' Helpline | Toronto Downtown North |
| Canadian Cancer Society - Ontario Division - Peer Match Program, Canadian Cancer Society - Ontario Division | Toronto Downtown North |
| Canadian Caribbean Association of Halton, Cultural Heritage Group | Oakville |
| Canadian Centre for Housing Rights, Eviction Prevention and Tenant Services | Toronto |
| Canadian Club of Halton | Oakville |
| Canadian Coalition for Seniors' Mental Health, Markham | Markham |
| Canadian Counselling and Psychotherapy Association, Ottawa | Ottawa |
| Canadian Croatian Choral Society | Oakville |
| Canadian Forces Morale and Welfare Services, Family Information Line | Ottawa |
| Canadian Guide Dogs for the Blind | Ottawa |
| Canadian Hard of Hearing Association, Canadian Hard of Hearing Association Advocacy and Support Groups | |
| Canadian Hard of Hearing Association, Ottawa, Canadian Hard of Hearing Association, Ottawa | Ottawa |
| Canadian Hearing Services, Hamilton Audiology Clinic, Canadian Hearing Services, Canadian Hearing Services Counselling Services | Hamilton |
| Canadian Hearing Services - Toronto and York Region, Canadian Hearing Services, Mississauga Regional Office | Mississauga |
| Canadian Hearing Services - Toronto and York Region, Canadian Hearing Services, Toronto Regional Office | Toronto |
| Canadian Hemophilia Society, Toronto and Central Ontario Region, Blood Disorders Information and Support | Scarborough North |
| Canadian Home Healthcare, Sleep Apnea Therapy and Home Oxygen | Oakville |
| Canadian Indian Association of Halton Region, Cultural Heritage Group | Oakville |
| Canadian Italian Family Assistance Association, Toronto | Toronto |
| Canadian Japanese Cultural Centre of Hamilton, Canadian Japanese Cultural Centre of Hamilton Programs | Hamilton |
| Canadian Memorial Chiropractic College, Bronte Harbour Chiropractic Clinic | Oakville |
| Canadian Mental Health Association, Oakville - Halton Region Branch Head Office, Mental Health Services | Oakville |
| Canadian Mental Health Association, Counselling Service | Halton Region |
| Canadian Mental Health Association, Education and Training | Oakville |
| Canadian Mental Health Association, Mobile Outreach Team - COAST - Crisis Outreach and Support Team | Oakville |
| Canadian Mental Health Association, Milton and Halton Hills, Mental Health Services | Milton |
| Canadian Mental Health Association, National, Toronto - Online/Web Service, Mental Health Resources | Toronto |
| Canadian Power and Sail Squadrons, Burlington, CanBoat Burlington | Burlington |
| Canadian Power and Sail Squadrons, Oakville, CanBoat Oakville | Oakville |
| Canadian Red Cross, Burlington Branch | Burlington |
| Canadian Red Cross, Burlington Branch, Meals on Wheels | Burlington |
| Canadian Red Cross, Burlington Branch, Transportation | Burlington |
| Canadian Red Cross, Halton and Peel Regional Office, Ontario Friendly Calls Program | Mississauga |
| Canadian Snowbird Association | Toronto |
| Canadian Ukrainian Immigrant Aid Society | Toronto |
| Canadian Virtual Hospice | Winnipeg |
| Cancer Assistance Halton Hills | Halton Hills |
| CANES Community Care, Ride Connect | Toronto |
| CANES Community Care, Care Bridge Program | Toronto |
| Cangrands National Kinship Support, Mailing Address | Cobourg |
| Capability Support Services, Community Outreach Services | Burlington |
| Capability Support Services, Burlington - Aldershot Village, Supportive Housing | Burlington |
| Capability Support Services, Burlington - Carey House, Shared Living | Burlington |
| Capability Support Services, VIS-ABLE Program | Burlington |
| Care for Life Support Services, Specialized Supports for Older Adults | Burlington |
| caregiverexchange.ca | London |
| CareLink Advantage | Milton |
| CarePartners, In-Home Care Services | Mississauga |
| CarePoint Health, Brampton-Halton-Mississauga-South Etobicoke, Ontario Structured Psychotherapy Program | Mississauga |
| CareRx SmartMeds Pharmacy, Pharmacy Services | Burlington |
| Caroline Family Health Team | Burlington |
| Caroline Family Health Team, Diabetes Education Program | Burlington |
| CARP, Halton Chapter | Halton Region |
| Carpenter Hospice | Burlington |
| CBI Health, Driver Assessment Services | Burlington |
| CBI Home Health - Mississauga Traders, In Home Care Services | Mississauga |
| CCF for PSP Awareness, Online/Web Service, Support Group | Burlington |
| Cedar Springs Ski Club | Burlington |
| Cemeteries, Crematoria and Interment of Ashes - Burlington and Area | Burlington |
| Central Baptist Church | Oakville |
| Central Registry | Oakville |
| Central Registry, Adult Day Programs | Oakville |
| Central Registry, Caregiver ReCharge | Oakville |
| Central Registry, Food Support Programs | Oakville |
| Central Registry, Supports for Daily Living | Oakville |
| Central Registry, Temporary short stays out-of-home | Oakville |
| Centre for Addiction and Mental Health, Addiction Medicine Services and Specialized Clinics | Toronto |
| Centre for Addiction and Mental Health, CAMH Support Resources and Information Services | Toronto |
| Centre for Addiction and Mental Health, INTREPID Lab | Toronto |
| Centre for Complex Diabetes Care, Complex Diabetes Care | Oakville |
| Challenge Golf | Oakville |
| CharterAbility | Oakville |
| Chartwell Baptist Community Homes, Prince Charles Place | Oakville |
| Chartwell Church | Oakville |
| Chartwell Lakeshore Retirement Residence | Burlington |
| Chartwell Martha's Landing Retirement Residence | Burlington |
| Chartwell Oakville Retirement Residence | Oakville |
| Chartwell Waterford Retirement Residence | Oakville |
| Chez Pharmacy, Pharmacy Services | Burlington |
| Chinese and Southeast Asian Legal Clinic | Toronto |
| Chinese Association of Mississauga, Mississauga | Mississauga |
| Chinmaya Mission Halton Region | Milton |
| Christie Oaks Care Home | Acton |
| Church of Jesus Christ of Latter-day Saints (The), Burlington Ward | Burlington |
| Church of St George and St Abanoub | Milton |
| Church of St Matthew on the Plains | Burlington |
| Church of the Epiphany | Oakville |
| Churchill Community Church | Acton |
| Circle of Friends Tai Chi Club | Milton |
| Circle of Harmony Chorus | Oakville |
| Circulate Cardiac & Vascular Centre | Burlington |
| City of Hamilton, Planning and Economic Development Department, Tourism and Culture Division, Tourism Hamilton, Visitor Information Centre | Hamilton |
| Classic Book Club | Oakville |
| Cleaning For A Reason | |
| CLEAResult Canada, Central East, Authorized Delivery agent for Enbridge Home Winterproofing and IESO Energy Affordability Programs | Toronto |
| Clearpoint Pharmacy and Compounding Services, Pharmacy Services | Burlington |
| ClearView Church | Oakville |
| Clearview Medical Clinic, Oakville, Family Practice and Walk-in Clinic | Oakville |
| Clearview Pharmacy, Pharmacy Services | Oakville |
| CLEO, Steps to Justice, Toronto | Toronto |
| CLEO, Toronto | Toronto |
| Closing the Gap Healthcare, In Home Care Services | Mississauga |
| CNIB, Toronto Region, Impaired Vision Information and Support | North York Central |
| Cocaine Anonymous | Toronto Downtown Central |
| Cogir Senior Living, Appleby Place Retirement Home | Burlington |
| Cogir Senior Living, The Williamsburg Retirement Home | Burlington |
| Cogir Senior Living, Retirement Home | Oakville |
| Colleen's Care Company | Oakville |
| College of Physicians and Surgeons of Ontario | Toronto Downtown Central |
| College of Registered Psychotherapists of Ontario | Toronto Downtown |
| Colorectal Cancer Resource and Action Network (CCRAN) | Oakville |
| ComForCare Home Care, Halton, In Home Care Services | Milton |
| Comfort First Caregivers | Halton Hills |
| Comfort Keepers, Halton Hills, Milton and Guelph, In-Home Care Services | Halton Hills |
| Comfort Keepers, Oakville, In Home Care Services | Oakville |
| Community Conflict Resolution Services of Halton | Milton |
| Community Development Halton | Acton |
| Community Development Halton, Burlington | Burlington |
| Community Development Halton, Volunteer Halton | Burlington |
| Community Rehabilitation, In-Home Physiotherapy | Lorne Park |
| Community Service Movers | Mississauga |
| Compass Community Health Centre, Diabetes Foot Care Program | Hamilton |
| Compass Point Bible Church | Burlington |
| Compass Point Bible Church, Food Market | Burlington |
| Compassion Society of Halton | Burlington |
| Compassion Society of Halton, Burlington, Food Market | Burlington |
| Compounding Centre (The), Oakville - Postmaster Dr, Pharmacy Services | Oakville |
| Concerned Friends of Ontario Citizens in Care Facilities | Toronto Downtown North |
| Connected Canadians, Technology training and support for seniors | Ottawa |
| Connected Care Halton Ontario Health Team (CCHOHT), Oakville, Navigation Line | Oakville |
| ConnexOntario, Helpline | London |
| Consent and Capacity Board | Toronto |
| Conservation Halton, Burlington - Mount Nemo Conservation Area, Conservation Land & Recreational Trails | Burlington |
| Conservation Halton, Campbellville - Mountsberg Conservation Area, Conservation Land & Recreational Trails | Milton |
| Conservation Halton, Milton - Area 8 Conservation Area, Conservation Land & Recreational Trails | Milton |
| Conservation Halton, Milton - Crawford Lake Conservation Area, Conservation Land & Recreational Trails | Milton |
| Conservation Halton, Milton - Hilton Falls Conservation Area, Conservation Land & Recreational Trails | Milton |
| Conservation Halton, Milton - Kelso Conservation Area / Glen Eden, Conservation Land & Recreational Trails | Milton |
| Conservation Halton, Milton - Rattlesnake Point Conservation Area, Conservation Land & Recreational Trails | Milton |
| Conservation Halton, Milton - Robert Edmondson Conservation Area, Conservation Land & Recreational Trails | Milton |
| Consolidated Credit Counselling Services of Canada | Toronto |
| Cornerstone Baptist Church | Oakville |
| Cornwall Medical Clinic | Oakville |
| Cornwall Pharmacy, Pharmacy Services | Oakville |
| Costco Pharmacy, Burlington - Brant St, Pharmacy Services | Burlington |
| Country Heritage Park, Food and Farm Education, Field Trip Venue, Private Tours, Heritage Venue, Event Venue and Operational Farm | Milton |
| CPAP Central, Georgetown | Halton Hills |
| Creative Community Hive, Burlington, Oakville and Milton, Community Crafting Sessions | Halton Region |
| Credit Canada, Oakville Office | Oakville |
| Credit Canada Debt Solutions, Debt and personal money management services | Toronto |
| Credit Counselling Society, Hamilton Credit Counselling Office, Credit Counselling Society Debt Help | Hamilton |
| Credit Counselling Society, GTA, Mississauga, Financial support, Mississauga | Mississauga |
| Credit Valley Artisans | Georgetown |
| Credit Valley Conservation Authority, Limehouse Conservation Area, Conservation Land & Recreational Trails | Halton Hills |
| Credit Valley Conservation Authority, Silver Creek Conservation Area, Conservation Land & Recreational Trails | Halton Hills |
| Credit Valley Diagnostic Centre | Milton |
| Croatian Social and Cultural Centre | Halton Hills |
| Crohn's and Colitis Canada, Halton Region Chapter | Halton Region |
| Crossings Community Church | Acton |
| Crosstowne Church | Milton |
| Cruisers Sports | Meadowvale |
| Crusaders Rugby Club | Oakville |
| Crystal Care Medical Clinic, Family Practice and Walk-in | Milton |
| Crystal Care Pharmacy, Pharmacy Services | Milton |
| Custom Orthotic Design Group, Orthotic Centre at the Credit Valley Hospital | Erin Mills |
| Cyber-Seniors | |
| Cycling Without Age Hamilton & Burlington | Burlington |
| Cystic Fibrosis Canada, Cystic Fibrosis Canada Services | Hamilton |
