| Nankind | Toronto |
| Nar-Anon Family Groups, Halton Meetings | Halton Region |
| Narcotics Anonymous | Halton Region |
| Nasagiweya Historical Society | Milton |
| Naseeha Mental Health, Mississauga, Peer Counselling and Information | Mississauga |
| Nassagaweya Presbyterian Church | Milton |
| Nassagaweya Tennis Club, Campbellville | Milton |
| National Cycling Institute Milton | Milton |
| National Eating Disorder Information Centre | Toronto Downtown Central |
| National Educational Association of Disabled Students, Ottawa | Ottawa |
| National Initiative for Eating Disorders, Education and Support Services | Toronto |
| National ME / FM Action Network, Nepean, Support Services | Ottawa |
| National NewsMedia Council | Toronto |
| National Pensioners Federation | Mississauga |
| National Service Dogs | Cambridge |
| National Student Loans Service Centre, Student Loans | Mississauga |
| National Trust for Canada, Ottawa | Ottawa |
| Native Canadian Centre of Toronto, Community services | Toronto |
| Native Child and Family Services of Toronto, Mdewgaan Lodge | Toronto |
| Native Horizons Treatment Centre | New Credit |
| Native Women's Association of Canada | Gatineau |
| Native Women's Resource Centre of Toronto, Community Programs | Toronto |
| Naturally Clean, Hoarding and Clutter Clean-up Services | St Catharines |
| Navy League of Canada, Acton, Navy League Cadet Corps Compass Rose | Acton |
| Neurofibromatosis Ontario | |
| New GAA (The) | Burlington |
| New Life Deaf Church, Milton | Milton |
| New Life Pentecostal Church | Milton |
| Newcomer Centre of Peel, Mississauga, Community Connections Mentorship Program | Mississauga |
| Newcomer Centre of Peel, Mississauga, Language Instruction for Newcomers to Canada | Mississauga |
| Newcomer Centre of Peel, Mississauga, Settlement Services | Mississauga |
| NewLife Fertility Centre, Burlington, Reproductive Care | Burlington |
| Newlife Fertility Centre, Milton, Reproductive Care | Milton |
| Newlife Fertility Centre, Oakville, Reproductive Care | Oakville |
| Niagara Escarpment Commission | Georgetown |
| Nigerian Community Halton | North Oakville |
| Ninth Life Cat Rescue | Oakville |
| Nipissing Medical Clinic, Family Practice and Walk-In Clinic | Milton |
| Nisa Foundation, Nisa Homes, Mississauga | Mississauga |
| Nisa Foundation, Remote Casework | Mississauga |
| Nisa Helpline, Muslim Women's Helpline | |
| Noojimo Health, Virtual Mental Wellness Clinic | Ontario |
| North Burlington Baptist Church | Burlington |
| North Burlington Medical Centre, Walk-in Medical Clinic | Burlington |
| North Burlington Tennis Club | Burlington |
| North BurLINKton Community Group, Dinner Night Out | Burlington |
| North Central Community Association | Burlington |
| North Halton Community Singers | Acton |
| North Halton Girls Hockey Association | Georgetown |
| North Halton Kitten Rescue | Georgetown |
| North Halton Rugby Football Club | Georgetown |
| North Oakville Ward 7 Residents' Association | Oakville |
| Norval United Church, Georgetown | Georgetown |
| Nottinghill Co-operative Preschool, Licensed Child Care Centre | Oakville |
| NPower Canada | Toronto |
| Nucleus Independent Living | Oakville |
| Nucleus Independent Living, Regional Learning Centre | Oakville |
| Nurse Next Door, Oakville, In Home Care Services | Oakville |
| Nurse Next Door Home Care Services, Milton, In Home Care Services | Milton |
| Nutrition Pathway | Oakville |
