| Abbey Oaks Slo Pitch, Men's Slo Pitch League | Oakville |
| Acton Agricultural Society | Acton |
| Acton Soccer Club | Acton |
| ADR Institute of Ontario | Toronto |
| Aldershot Community Recreation Association | Burlington |
| Aldershot Village Business Improvement Area | Burlington |
| Alliance for Healthier Communities | North York West |
| Art Gallery of Burlington | Burlington |
| Arts Burlington | Burlington |
| Arts Milton | Milton |
| ArtWorks Oakville | Oakville |
| Association of Ontario Midwives | Toronto Downtown Central |
| Association of Translators and Interpreters of Ontario | Ottawa |
| Autism Ontario, Halton Chapter - Mailing Address | Burlington |
| Autism Ontario | Toronto Downtown West |
| Average Joe Sports Club, Co-ed Recreational Sports Leagues | Oakville |
| BaseballMilton | Milton |
| Bob Rumball Canadian Centre of Excellence for the Deaf, Community Participation Supports - Virtual and Day Program | Milton |
| Brain Injury Association of Peel and Halton | Mississauga |
| Bronte Business Improvement Area | Oakville |
| Brookville Masters Slo Pitch League | Milton |
| Burlington Amateur Softball Association | Burlington |
| Burlington Ball Hockey League | Burlington |
| Burlington Basketball | Burlington |
| Burlington Centaurs Rugby Football Club | Burlington |
| Burlington Chamber of Commerce | Burlington |
| Burlington Downtown Business Association | Burlington |
| Burlington Fine Arts Association | Burlington |
| Burlington Girls Hockey Club | Burlington |
| Burlington Lions-Optimist Minor Hockey Association | Burlington |
| Burlington Mens Hockey League | Burlington |
| Burlington Minor Ball Hockey League | Burlington |
| Burlington Minor Football Association | Burlington |
| Burlington Minor Lacrosse Association | Burlington |
| Burlington Ontario Health Team | Burlington |
| Burlington Organized Minor Baseball Association | Burlington |
| Burlington Pickleball Association, Athletic Association | Burlington |
| Burlington Soccer Club | Burlington |
| Burlington Vintage Baseball League | Burlington |
| Burlington Womens Recreational Soccer League | Burlington |
| Canadian Counselling and Psychotherapy Association | Ottawa |
| Canadian Hard of Hearing Association, Ottawa, Canadian Hard of Hearing Association, Ottawa | Ottawa |
| 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 Hospice Palliative Care Association | Ottawa |
| Canadian Labour Congress, Toronto, Ontario Regional Office | Toronto |
| Canadian Marketing Association | Toronto |
| Canadian Veterinary Medical Association, National Office | Ottawa |
| Canadian Virtual Hospice | Winnipeg |
| Centre for Diverse Learners | Burlington |
| College of Audiologists and Speech Language Pathologists of Ontario | Toronto Downtown North |
| College of Chiropractors of Ontario | Toronto Downtown Central |
| College of Dental Hygienists of Ontario | Toronto Downtown Central |
| College of Denturists of Ontario | Toronto Downtown Central |
| College of Dietitians of Ontario | Toronto |
| College of Early Childhood Educators, Toronto, Registered Early Childhood Educators | Toronto |
| College of Massage Therapists of Ontario | Toronto Downtown North |
| College of Midwives of Ontario | Toronto Downtown North |
| College of Nurses of Ontario | Toronto Downtown North |
| College of Occupational Therapists of Ontario | Toronto Downtown Central |
| College of Opticians of Ontario | Toronto Downtown Central |
| College of Optometrists of Ontario | Toronto Downtown North |
| College of Physicians and Surgeons of Ontario | Toronto Downtown Central |
| College of Physiotherapists of Ontario | Toronto Downtown Central |
| College of psychologists and behaviour analysts of Ontario (The) | Toronto Downtown North |
| College of Registered Psychotherapists of Ontario | Toronto Downtown |
| College of Respiratory Therapists of Ontario | Toronto Downtown Central |
| College of Traditional Chinese Medicine Practitioners and Acupuncturists of Ontario | Markham |
| College of Veterinarians of Ontario | Guelph |
| Communication Disabilities Access Canada, Toronto - Online Service | Toronto |
| Community Development Halton, Volunteer Halton | Burlington |
| Connected Care Halton Ontario Health Team (CCHOHT) | Oakville |
| Credit Valley Artisans | Georgetown |
| Dietitians of Canada | Toronto Downtown Central |
| Downtown Acton Business Improvement Area | Acton |
| Downtown Milton Business Improvement Area | Milton |
| Downtown Oakville Business Improvement Area | Oakville |
| Easter Seals Canada | Toronto Downtown North |
| Editors Canada, Hamilton-Halton Chapter | Halton Region |
| Elementary Teachers Federation of Ontario, Halton Local | Burlington |
| Feed Ontario, Toronto | Toronto |
| Fine Arts Society of Milton | Milton |
| Force Soccer Academy | Burlington |
| Georgetown Agricultural Society, Georgetown Fall Fair | Georgetown |
| Georgetown Central Business Improvement Area, Downtown Georgetown Business Improvement Area | Georgetown |
| Georgetown Ladies Powderpuff League | Georgetown |
| Georgetown Slopitch League | Georgetown |
| Georgetown Soccer Club | Georgetown |
| Glen Abbey Ladies Slo Pitch League | Oakville |
| Glen Abbey Slo-Pitch League | Oakville |
| Golden Horseshoe Disabled Sports Association, Vipers Wheelchair Basketball | Burlington |
| Golden Horseshoe Touch Football Association | Burlington |
| Halton Agricultural Society | Milton |
| Halton and Oakville Men's Hockey League | Oakville |
| Halton County Law Association | Milton |
| Halton Down Syndrome Association | Burlington |
| Halton Hawks Girls Fastpitch Association | Halton Hills |
| Halton Hills Chamber of Commerce | Georgetown |
| Halton Hills Minor Ball Hockey League | Halton Hills |
| Halton Hills Minor Baseball Association | Halton Hills |
| Halton Hills Minor Hockey | Halton Hills |
| Halton Hills Minor Lacrosse Association | Georgetown |
| Halton Hills Pickleball Association, Athletic Association | Halton Hills |
| Halton Information Providers | Oakville |
| Home Child Care Association of Ontario, Website Only | Toronto |
| Hospice Palliative Care Ontario | Toronto Downtown Central |
| Institute for Advancements in Mental Health, Toronto | Toronto |
| Insurance Bureau of Canada, Consumer Information Centre | Toronto |
| International Dyslexia Association - Ontario Branch | Ontario |
| Kerr Village Business Improvement Area | Oakville |
| Little People of Ontario - LPO | Toronto |
| Milton Chamber of Commerce | Milton |
| Milton Girls Softball | Milton |
| Milton Ladies Slo Pitch, Recreational Softball League | Milton |
| Milton Ladies Softball League | Milton |
| Milton Minor Ball Hockey League | Milton |
| Milton Minor Hockey Association | Milton |
| Milton Minor Lacrosse Association | Milton |
| Milton Music Teachers Association | Milton |
| Milton Pickleball Association | Milton |
| Milton Youth Soccer Club | Milton |
| North Central Community Association | Burlington |
| North Halton Girls Hockey Association | Georgetown |
| Oakville Art Society | Oakville |
| Oakville Arts Council | Oakville |
| Oakville Chamber of Commerce | Oakville |
| Oakville Festivals of Film and Art | Oakville |
| Oakville Girls Softball Association | Oakville |
| Oakville Hornets Girls Hockey Association | Oakville |
| Oakville Independent Schools | Oakville |
| Oakville Little League Baseball | Oakville |
| Oakville Milton and District Real Estate Board | Milton |
| Oakville Minor Baseball Association | Oakville |
| Oakville Minor Lacrosse Association | Oakville |
| Oakville Pickleball Association, Athletic Association | Oakville |
| Oakville Professional Fire Fighters Association | Oakville |
| Oakville Rangers Hockey Club | Oakville |
| Oakville Senior Ladies Basketball League | Oakville |
| Oakville Soccer Club | Oakville |
| Ontario Society of Chiropodists | Newmarket |
| Ontario Association of Children's Aid Societies, Toronto, OACAS Member Services | Toronto |
| Ontario Association of Children's Aid Societies, Toronto, YouthCAN | Toronto |
| Ontario Association of the Deaf | North York |
| Ontario Chamber of Commerce, Ontario - Online Service, Find a Chamber of Commerce | Ontario |
| Ontario Chiropractic Association | Toronto Downtown Central |
| Ontario College of Pharmacists | Toronto Downtown North |
| Ontario College of Social Workers and Social Service Workers | Toronto Downtown North |
| Ontario College of Teachers, Toronto | Toronto |
| Ontario Community Support Association, Toronto | Toronto |
| Ontario Dental Association | Toronto Downtown North |
| Ontario Federation for Cerebral Palsy | Etobicoke North |
| Ontario Federation of Agriculture, Halton Region Federation of Agriculture | Milton |
| Ontario Federation of Teaching Parents | Ontario |
| Ontario Hospital Association | Toronto Downtown Central |
| Ontario Psychological Association, Psychologists Referral Service | Toronto |
| Ontario Registered Music Teachers Association, Hamilton-Halton Branch - No Physical Address | Halton Region |
| Ontario Secondary School Teachers Federation, Halton - District 20 | Burlington |
| Ontario Society of Registered Psychotherapists | Toronto Downtown Central |
| Registered Massage Therapists' Association of Ontario | Etobicoke |
| Ringette Association of Burlington | Burlington |
| Royal College of Dental Surgeons of Ontario | Toronto Downtown North |
| Sensity Deafblind and Sensory Support Network of Canada, Paris - Main St | Paris |
| Sickle Cell Awareness Group of Ontario | North York |
| Silent Voice Canada | Toronto Downtown North |
| Slo-Pitch Ontario Association, St Catharines | St Catharines |
| Speech-Language & Audiology Canada, Ottawa | Ottawa |
| Sport Oakville | Oakville |
| War Amps (The), Ottawa - National Headquarters | Ottawa |
