| Nankind GTA, North York Office, Nanny Angel Network Child Care and Support | Toronto |
| Nar-Anon Family Groups, Halton Meetings | Halton Region |
| Narcotics Anonymous | Halton Region |
| Nasagiweya Historical Society | Milton |
| Naseeha Mental Health | Mississauga |
| Nassagaweya Presbyterian Church | Milton |
| Nassagaweya Tennis Club | Milton |
| National Association of Friendship Centres | Ottawa |
| National Cycling Institute Milton | Milton |
| National Eating Disorder Information Centre | Toronto Downtown Central |
| National ME / FM Action Network | Ottawa |
| National NewsMedia Council | Toronto |
| National Pardon Centre | Toronto |
| National Pensioners Federation | Mississauga |
| National Service Dogs | Cambridge |
| National Student Loans Service Centre | Mississauga |
| National Trust for Canada | Ottawa |
| Native Canadian Centre of Toronto | Toronto |
| Native Child and Family Services of Toronto, Women's Transition House | Toronto |
| Native Horizons Treatment Centre | New Credit |
| Native Women's Association of Canada | Ottawa |
| Native Women's Resource Centre of Toronto, Community Programs | Toronto |
| Naturally Clean, Hoarding and Clutter Clean-up Services | Halton Region |
| Navy League of Canada, Acton, Navy League Cadet Corps Compass Rose | Acton |
| Neurofibromatosis Ontario | London |
| New Horizons Media Inc., New Canadians | Pickering |
| New Life Deaf Church, Milton | Milton |
| New Life Pentecostal Church | Milton |
| Newcomer Centre of Peel | 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 |
| Ninth Life Cat Rescue of Ontario | Oakville |
| Nisa Helpline, Muslim Women's Helpline | |
| Nisa Homes, Mississauga Administrative Office, Nisa Homes, Mississauga | Mississauga |
| Normandy Medical Clinic | Halton Hills |
| North Burlington Baptist Church | Burlington |
| North Burlington Medical Centre, Walk-in Medical Clinic | Burlington |
| North Burlington Tennis Club | Burlington |
| North BurLINKton Community Group | Burlington |
| North Central Community Association | Burlington |
| North Halton Community Singers | Georgetown |
| North Halton Girls Hockey Association | Georgetown |
| North Halton Kitten Rescue | Georgetown |
| North Halton Rugby Football Club | Georgetown |
| North Oakville Ward 7 Residents' Association | Oakville |
| Northridge Long Term Care Centre | Oakville |
| Norval Community Association | Halton Hills |
| Norval Presbyterian Church | Halton Hills |
| Norval United Church, Georgetown | Halton Hills |
| Nottinghill Co-operative Preschool, Licensed Child Care Centre | Oakville |
| NPower Canada | Toronto |
| Nucleus Independent Living | Oakville |
| Nurse Next Door Home Care Services, Oakville and Burlington, In Home Care Services | Oakville |
| Nurse Next Door Home Care Services, Milton, In Home Care Services | Milton |
| Nutrition Pathway | Oakville |
