| Organization Name(s) | Located In |
| Naomi's Family Resource Centre | Winchester |
| Napanee and District Chamber of Commerce and Tourist Information Centre | Napanee |
| Napanee and District Multicultural Association | Napanee |
| Napanee Badminton | Greater Napanee |
| Napanee Baptist Church | Napanee |
| Napanee Beaver | Napanee |
| Napanee District Community Foundation | Napanee |
| Napanee Guide | Napanee |
| Napanee Mixed Volleyball League | Napanee |
| Napanee Photo Club | Napanee |
| Napanee Shuffleboard Club | Napanee |
| Napanee Women's Volleyball League | Napanee |
| Nar-Anon Family Groups | City of Ottawa |
| Narcotics Anonymous | Ottawa |
| Narcotics Anonymous, Belleville | Belleville |
| Narcotics Anonymous, Central Lake Area, Bancroft | Bancroft |
| Narcotics Anonymous, Limestone Area | Kingston |
| Narcotics Anonymous, Ottawa Area, Carleton Place | Carleton Place |
| Narcotics Anonymous, Ottawa Area, Pembroke, New Life Group | Pembroke |
| Narcotics Anonymous, Ottawa Area, Renfrew, Back to Basics | Renfrew |
| Narcotics Anonymous, Ottawa Area, Renfrew, Back to Basics | Renfrew |
| Narcotics Anonymous, Picton | Picton |
| Narcotics Anonymous, Trenton | Trenton |
| Nation Municipality Public Library, St Albert Branch | St Albert |
| Nation Municipality. Township Offices | Casselman |
| Nation Municipality. Township Offices, Satellite Office | Fournier |
| Nation Public Library, Limoges Branch | Limoges |
| Nation Public Library, St. Isidore Branch | St Isidore de Prescott |
| Nation Valley All-Terrain Vehicle Club | Winchester |
| Nation Valley Snowmobile Association | South Dundas |
| National Aboriginal Health Organization | Ottawa |
| National Air Force Museum of Canada | Trenton |
| National Capital Freenet | Ottawa |
| National Capital Region Vietnamese Canadian Non Profit Housing Corporation, Van Lang Centre | Ottawa |
| National Capital Region YMCA-YWCA | Ottawa |
| National Capital Region YMCA-YWCA, Child Care Services | Ottawa |
| National Capital Region YMCA-YWCA, Domestic Violence Program, Children Witnesses of Domestic Violence | Ottawa |
| National Capital Region YMCA-YWCA, Employment, Enterprise and Newcomer Services, Language Assessment and Referral Centre | Ottawa |
| National Capital Region YMCA-YWCA, Employment, Enterprise and Newcomer Services, The Enterprise Centre | Ottawa |
| National Capital Region YMCA-YWCA, Fitness Education Centre, Certifications, Recertifications, Workshops | Ottawa |
| National Capital Region YMCA-YWCA, Housing Services, Shenkman Residence | Ottawa |
| National Capital Region YMCA-YWCA, Newcomer Information Centre | Ottawa |
| National Capital Region YMCA-YWCA, Ontario Employment Services, Argyle Ave | Ottawa |
| National Capital Region YMCA-YWCA, Ontario Employment Services, Merivale Rd | Ottawa |
| National Capital Region YMCA-YWCA, Recreational Programs and Services, Regional Ys | City of Ottawa |
| National Case Management Network | Toronto |
| National Farmers Union in Ontario | Guelph |
| National Federation of Federal Retirees, Algonquin Valley Branch | Renfrew County |
| National Pardon Centre | Toronto |
| Native Women's Association of Canada, National Headquarters | Ottawa |
| Nativity Parish Food Cupboard | Ottawa |
| Natural Family Planning Association, Ontario | Kingston |
| Natural Health Centre | Barry's Bay |
| Natural Therapy Centre | Killaloe, Hagarty and Richards |
| Naturopathic Doctor | Barry's Bay |
| Naval Marine Archive: The Canadian Collection | Picton |
| NEED2 Suicide Prevention Education & Support, Victoria | Victoria |
| Neighbourhood Information Post | Toronto |
| Neighbourhood Sharing Centre | Kingston |
| Neil Squire Society, Central Regional Office | Nepean |
| Neil Squire Society, Employ-Ability | Nepean |
| Neil Squire Society, Pembroke Office | Pembroke |
| Nelson House of Ottawa-Carleton | Nepean |
| Nepean Allotment Gardens Association | City of Ottawa |
| Nepean Corona School of Gymnastics | Nepean |
| Nepean Housing Corporation | Nepean |
| Nepean Sports Medicine and Physiotherapy Centre | Nepean |
| Nepean, Rideau and Osgoode Community Resource Centre | Nepean |
| Nepean, Rideau and Osgoode Community Resource Centre, Elder Abuse Response and Referral Service | Nepean |
| Nepean, Rideau and Osgoode Community Resource Centre, Ottawa Diabetes Education Program | Ottawa |
| Neurofibromatosis Society of Ontario | Pickering |
| NeuroGym Rehabilitation | Ottawa |
| NeuroLogic Physiotherapy | Ottawa |
| New Avenues Linguistic Services Inc | Ottawa |
| New Beginnings Quinte Cancer Support Group | Trenton |
| New Directions, Targeted Initiative for Older Workers | Smiths Falls |
| New Edinburgh Pharmacy, Ottawa, Beechwood Ave | City of Ottawa |
| New Edinburgh Square | Ottawa |
| New Hope Christian Fellowship | Belleville |
| New Leaf Link | Sydenham |
| New Life Counselling Centre, Smiths Falls | Smiths Falls |
| New Life Girls' Home Canada | Prince Edward County |
| New Life Group | Kingston |
| New Orchard Lodge, Long Term Care Home | Ottawa |
| Newgate 180 Addiction Solutions, Women's Centre | Merrickville |
| Newington Wesleyan Church | Newington |
| Next Church (The) | Kingston |
| Nielson Store Museum & Cultural Centre | Amherst Island |
| Nook & Cranny Cleaning Services, Residential & Commercial Cleaning | Rockland |
| Nooners Ice Boat Club | Quinte West |
| North Algona Wilberforce Township | Eganville |
| North Augusta Pastoral Charge, Algonquin United Church, Manhard United Church | North Augusta |
| North Augusta Pastoral Charge, Manhard United Church | Manhard |
| North Augusta Pastoral Charge, North Augusta United Church | North Augusta |
| North Dundas Fire Department, Chesterville | Chesterville |
| North Dundas Fire Department, Morewood | Morewood |
| North Dundas Fire Department, Mountain | Mountain |
| North Dundas Fire Department, South Mountain | Mountain |
| North Dundas Fire Department, Winchester | Winchester |
| North Dundas. Municipal Offices, Clerk's Office | Winchester |
| North Dundas. Municipal Offices, Public Works | Winchester |
| North Dundas. Municipal Offices, Recreation and Culture | Winchester |
| North Dundas. Municipal Offices, Water and Sewer Department | Winchester |
| North Frontenac Food Bank | Sharbot Lake |
| North Frontenac Non-Profit Housing | Sharbot Lake |
| North Frontenac. Community Halls, Barrie Hall | Cloyne |
| North Frontenac. Community Halls, Clar Mill Hall | Cloyne |
| North Frontenac. Community Halls, Harlowe Hall | North Frontenac |
| North Frontenac. Community Halls, Ompah Hall | Ompah |
| North Frontenac. Community Halls, Snow Road Hall | Snow Road Station |
| North Frontenac. Emergency Services, Ompah Fire Hall | Ompah |
| North Frontenac. Emergency Services, Plevna Fire Hall | Plevna |
| North Frontenac. Emergency Services, Snow Road Station Fire Hall | Snow Road Station |
| North Glengarry. Municipal Offices | Alexandria |
| North Grenville Accessible Transportation | Kemptville |
| North Grenville Community Church | Kemptville |
| North Grenville Cooperative Preschool and Learning Centre | Kemptville |
| North Grenville Cooperative Preschool and Learning Centre, Before and After School Program, Kemptville Public School site | Kemptville |
| North Grenville Curling Club | Kemptville |
| North Grenville Fire Service | Kemptville |
| North Grenville Municipal Centre | Kemptville |
| North Grenville Public Library | Kemptville |
| North Grenville Public Library, Burritts Rapids Branch | Burritts Rapids |
| North Grenville Public Library, Norenberg Building, Kemptville Branch | Kemptville |
| North Grenville. Economic Development | Kemptville |
| North Grenville. Municipal Offices | Kemptville |
| North Hastings Budget Services | Bancroft |
| North Hastings Children's Services | Bancroft |
| North Hastings Children's Services, Family Resource Program | Bancroft |
| North Hastings Children's Services, Family Resource/Ontario Early Years Centre, Building Healthy Families | Bancroft |
| North Hastings Children's Services, Family Resource/Ontario Early Years Centre, Cooking with Kids Playgroup | Bancroft |
| North Hastings Children's Services, Family Resource/Ontario Early Years Centre, Family Support Program | Bancroft |
| North Hastings Children's Services, Family Resource/Ontario Early Years Centre, Food for You, Food for Two | Bancroft |
| North Hastings Children's Services, Family Resource/Ontario Early Years Centre, Healthy Busy Bodies | Bancroft |
| North Hastings Children's Services, Family Resource/Ontario Early Years Centre, School Readiness Program | Bancroft |
| North Hastings Children's Services, Food Program | Bancroft |
| North Hastings Community Cupboard | Bancroft |
| North Hastings Community Integration Association | Bancroft |
| North Hastings Community Trust | Bancroft |
| North Hastings Family Health Team, Community Health Clinic | Bancroft |
| North Hastings Heritage Museum | Bancroft |
| North Lanark Community Health Centre | Lanark |
| North Lanark Community Health Centre, Diabetes Program | Lanark |
| North Lanark Community Health Centre, Healthy Young Families Program | Lanark |
| North Leeds Soccer Club | Elgin |
| North Plantagenet Non-Profit Housing Corporation | Wendover |
| North Renfrew Family Health Team | Deep River |
| North Renfrew Family Services | Deep River |
| North Renfrew Long Term Care Services Inc. | Deep River |
| North Stormont. Municipal Offices | Berwick |
| North Stormont. Municipal Offices, Clerk's Department | Berwick |
| Northern Connections Adult Learning Centres, Sharbot Lake Office, Literacy and Basic Skills and Academic Upgrading | Sharbot Lake |
| Northern Frontenac Community Services Corporation | Sharbot Lake |
| Northern Frontenac Community Services Corporation, Family Counsellor | Sharbot Lake |
| Northern Frontenac Community Services Corporation, Land O' Lakes Women's Program | Sharbot Lake |
| Northern Frontenac Community Services Corporation, Ontario Disabilities Support Program, North Frontenac | Sharbot Lake |
| Northern Frontenac Community Services Corporation, Ontario Early Years Centre (The Child Centre), Parent and Caregiver Education Programs | Sharbot Lake |
| Northern Frontenac Community Services Corporation, Ontario Early Years Centre (The Child Centre), Playgroups | Sharbot Lake |
| Northern Frontenac Community Services Corporation, Ontario Early Years Centre (The Child Centre), School Age Programs | Sharbot Lake |
| Northern Frontenac Community Services Corporation, The Child Centre | Sharbot Lake |
| Northern Frontenac Community Services Corporation, The Child Centre, Day Care Centre | Sharbot Lake |
| Northern Lights Canada | |
| Northern Lights Canada, Ontario Employment Services | Ottawa |
| Northern Tech Diver | Kingston |
| Northumberland United Way, Info Northumberland | Cobourg |
| Nouvelle Scène (La) | Ottawa |
| Nurse Practitioners' Association of Ontario | Toronto |
| Nutri-Chem Pharmacy, Ottawa, Richmond Rd | Ottawa |