| Naismith Men's Shed, Almonte | Almonte |
| Nanny Angel Network, Kingston | Kingston |
| Naomi's Family Resource Centre | Winchester |
| Napanee and District Curling Club | Napanee |
| Napanee and District Multicultural Association | Napanee |
| Napanee Badminton Club, Napanee | Greater Napanee |
| Napanee Baptist Church | Napanee |
| Napanee Beaver | Napanee |
| Napanee Congregations of Jehovah's Witnesses, Kingdom Hall of Jehovah's Witnesses | Greater Napanee |
| Napanee District Minor Hockey | Napanee |
| Napanee Guide | Napanee |
| Napanee Housing Corporation | Napanee |
| Napanee Mixed Volleyball League | Napanee |
| Napanee Photo Club | Napanee |
| Napanee Women's Volleyball League | Napanee |
| Nar-Anon Family Groups | Ottawa (City of) |
| Narcotics Anonymous, Eastern Ontario - Find Location | Eastern Ontario |
| Narcotics Anonymous, Central Lake Area - Bancroft | Bancroft |
| Narcotics Anonymous, Hastings and Prince Edward County, Narcotics Anonymous, Limestone Area Service Committee | Belleville |
| Nation Health Centre | Limoges |
| Nation Valley All-Terrain Vehicle Club | Winchester |
| National Aboriginal Capital Corporations Association | Ottawa |
| National Aboriginal Circle Against Family Violence | Québec |
| National Air Force Museum of Canada, Quint West | Quinte West |
| National Arts Centre | Ottawa |
| National Association of Federal Retirees, Ottawa | Ottawa |
| National Association of Federal Retirees, Renfrew County - Algonquin Valley Branch | Renfrew County |
| National Association of Federal Retirees, Belleville | Belleville |
| National Association of Friendship Centres | Ottawa (City of) |
| National Association of Friendship Centres, New Journeys | Ottawa (City of) |
| National Association of Women and the Law | Ottawa |
| National Capital Able Sail Association | Ottawa (City of) |
| National Capital Area Crime Stoppers, Ottawa - Mailing Address | Ottawa |
| National Capital Commission Ombudsman | Ottawa |
| National Capital FreeNet | Ottawa |
| National Capital Region Vietnamese Canadian Non Profit Housing Corporation, Van Lang Centre | Ottawa |
| National Farmers Union in Ontario | Guelph |
| National Gallery of Canada | Ottawa |
| National ME/FM Action Network | Nepean |
| National Pardon Centre | Toronto Downtown |
| National Student Loans Service Centre | Mississauga |
| National Trust for Canada | Ottawa |
| National Youth In Care Network | Ottawa |
| Native Women's Association of Canada | Ottawa |
| Natural Family Planning Association, Stirling | Stirling |
| Natural Family Planning Association - Ontario, Kingston, Billings Natural Family Planning Association | Kingston |
| Natural Family Planning Association of Ontario, Ottawa - Unpublished | Ottawa (City of) |
| Natural Rhythms Health Centre, Stirling, Chiropractic Wellness Care | Stirling |
| Nature Canada | Ottawa |
| Naval Marine Archive: The Canadian Collection | Picton |
| Navy League of Canada - Belleville Branch, RCSCC QUINTE Sea Cadets | Belleville |
| Neighbourhood Information Post | Toronto Downtown East |
| Neighbourhood Sharing Centre | Kingston |
| Neighbourhood Watch, Kingston | Kingston |
| NeighbourLink Fountain | Arnprior |
| Neil Squire, Central Regional Office | Ottawa (City of) |
| Neil Squire, Central Regional Office, Working Together Program | Ottawa (City of) |
| Neilson Store Museum & Cultural Centre | Amherst Island |
| Nelson House of Ottawa-Carleton, Nepean - Unpublished | Nepean |
| Nepean Allotment Gardens Association | Ottawa (City of) |
| Nepean Corona School of Gymnastics | Nepean |
| Nepean Housing Corporation | Nepean |
| Nepean Museum | Nepean |
| Nepean South New Horizon Social Club | Nepean |
| Nepean Sports Medicine and Physiotherapy Centre | Nepean |
| Nepean, Rideau and Osgoode Community Resource Centre, Ottawa - Emerald Plaza | Nepean |
| Nepean, Rideau and Osgoode Community Resource Centre, Ottawa - Emerald Plaza, Elder Abuse Response and Referral Service | Nepean |
| Nepean, Rideau and Osgoode Community Resource Centre, Ottawa - Emerald Plaza, Ottawa Diabetes Education Program | Ottawa |
| Nepean, Rideau and Osgoode Community Resource Centre, Ottawa - Emerald Plaza, Tools 4 School | Nepean |
| Neurofibromatosis Ontario | London |
| NeuroGym Rehabilitation | Ottawa |
| NeuroLogic Physiotherapy and the Centre for Myofascial Release, Ottawa - Northside Rd | Ottawa |
| New Arrivals, Doula Services | Ottawa |
| New Avenues Linguistic Services Inc | Ottawa |
| New Beginning Church, Hands of Hope | Rockland |
| New Beginnings Pet Rescue | Ottawa |
| New Beginnings Quinte Cancer Support Group, Trenton | Trenton |
| New Democratic Party of Canada | Ottawa |
| New Hope Christian Fellowship, Belleville, Church | Belleville |
| New Hope Christian Fellowship, Belleville, Youth Program | Belleville |
| New Leaf Link | Harrowsmith |
| New Life Counselling Centre, Smiths Falls | Smiths Falls |
| New Life Girls' Home Canada, Consecon, Girls Counselling Home | Prince Edward County |
| New Life Group | Kingston |
| New Orchard Lodge, Long Term Care Home | Ottawa |
| Newburgh-Centreville Pastoral Charge, Centreville Memorial United Church | Centreville |
| Newburgh-Centreville Pastoral Charge, Newburgh United Church | Newburgh |
| Newgate 180 Addiction Solutions, Women's Centre | Merrickville |
| Newington Wesleyan Church | Newington |
| Next Church | Kingston |
| Nickle's Pharmacy, Marmora, Pharmacy | Marmora |
| Nightlight, Kingston | Kingston |
| Nightlight, Belleville | Belleville |
| Nisa Helpline, Muslim Women's Helpline | British Columbia |
| Nit Hunters Ottawa Lice Removal | Ottawa |
| No Frills DRUGStore Pharmacy, Orleans - Place d'Orléans Dr, Pharmacy | Orleans |
| Nofrills DRUGStore Pharmacy, Picton, Pharmacy | Picton |
| Nook & Cranny Cleaning Services, Residential & Commercial Cleaning | Rockland |
| North Algona Wilberforce Township | Eganville |
| North American Transport Driving Academy | Kingston |
| North Dundas. Fire Department, Station 1 - Morewood, Fire Services | Morewood |
| North Dundas. Fire Department, Station 2 - Hallville, Fire Services | Mountain |
| North Dundas. Fire Department, Station 2 - Mountain, Fire Services | Mountain |
| North Dundas. Fire Department, Station 3 - Winchester, Fire Services | Winchester |
| North Dundas. Fire Department, Station 4 - Chesterville, Fire Services | Chesterville |
| North Dundas. Municipal Offices, Winchester | Winchester |
| North Dundas. Municipal Offices, Winchester, Clerk's Office | Winchester |
| North Dundas. Municipal Offices, Winchester, Public Works | Winchester |
| North Dundas. Municipal Offices, Winchester, Recreation and Culture | Winchester |
| North Dundas. Municipal Offices, Winchester, Water and Sewer Department | Winchester |
| North Frontenac (Township of). Municipal Offices, Plevna Fire Hall, Fire and Emergency Services | Plevna |
| North Frontenac (Township of). Municipal Offices, Ompah - Ompah Hall, Community Halls | Ompah |
| North Frontenac (Township of). Municipal Offices, Ompah - Ompah Hall, Fire and Emergency Services | Ompah |
| North Frontenac (Township of). Municipal Offices, Ompah Community Library | Ompah |
| North Frontenac (Township of). Municipal Offices, Snow Road Station - Snow Road Hall, Community Halls | Snow Road Station |
| North Frontenac Food Bank | Sharbot Lake |
| North Frontenac Non-Profit Housing Corporation/Central Frontenac Housing Corporation | Sharbot Lake |
| North Frontenac. Emergency Services, Snow Road Station Fire Hall, North Frontenac Fire Department | Snow Road Station |
| North Glengarry. Municipal Offices | Alexandria |
| North Gower and District Outreach Food Bank, North Gower - Unpublished | North Gower |
| North Grenville Accessible Transportation | Kemptville |
| North Grenville Community Church | Kemptville |
| North Grenville Community Church, Kerith Debt Freedom Centre | Kemptville |
| North Grenville Cooperative Preschool and Learning Centre, Leahurst House - University of Guelph, Kemptville Campus | Kemptville |
| North Grenville Cooperative Preschool and Learning Centre, Kemptville Public School Site, Before and After School Program | Kemptville |
| North Grenville Curling Club | Kemptville |
| North Grenville Municipal Centre | Kemptville |
| North Grenville Public Library, Kemptville, Public Library | Kemptville |
| North Grenville Public Library, Burritts Rapids, Public Library | Burritts Rapids |
| North Grenville. Municipal Office | Kemptville |
| North Grenville. Municipal Office, Emergency and Protective Services | North Grenville |
| North Hastings Budget Services, Bancroft | Bancroft |
| North Hastings Children's Services, Bancroft | Bancroft |
| North Hastings Children's Services, Bancroft, EarlyON & Triple P Parenting | Bancroft |
| North Hastings Children's Services, Bancroft, Family Resource/EarlyON - Kitchen Connections | Bancroft |
| North Hastings Children's Services, Bancroft, Family Resource/EarlyON Centre - Family Support Program | Bancroft |
| North Hastings Children's Services, Bancroft, United Way Food Program | Bancroft |
| North Hastings Children's Services, Maynooth Public School, Algonquin Inodewiziwin Child and Family Centre | Maynooth |
| North Hastings Community Cupboard, Bancroft, Food Bank, Soup Kitchen & Community Gardens | Bancroft |
| North Hastings Community Integration Association, Bancroft | Bancroft |
| North Hastings Community Trust, Bancroft, Community Trust | Bancroft |
| North Hastings Family Health Team, Bancroft, Community Health Clinic | Bancroft |
| North Hastings Family Health Team & Diabetes Education Centre, Bancroft, Health Program | Bancroft |
| North Hastings Family Pharmacy, Bancroft | Bancroft |
| North Hastings Heritage Museum | Bancroft |
| North Hastings Ontario Early Years Child and Family Centre, Bancroft, Collective Kitchen | Bancroft |
| North Hastings Youth In Action | Bancroft |
| North Lanark Community Health Centre, Lanark | Lanark |
| North Lanark Community Health Centre, Lanark, Counselling and Support Services | Lanark |
| North Lanark Community Health Centre, Lanark, Diabetes Connection Group | Lanark |
| North Lanark Community Health Centre, Lanark, Healthy Young Families Program | Lanark |
| North Lanark Community Health Centre, Lanark, Lanark Renfrew Lung Health Program | Lanark |
| North Lanark Community Health Centre, Lanark, Primary Care Outreach to Seniors Program (PCO) | Lanark |
| North Lanark Community Health Centre, Lanark, Urgent Care Clinic | Lanark |
| North Plantagenet Non-Profit Housing Corporation | Wendover |
| North Renfrew Family Health Team | Deep River |
| North Renfrew Family Services | Deep River |
| North Renfrew Family Services, Basic Needs Program | Deep River |
| North Renfrew Family Services, Community Christmas Basket Program | Deep River |
| North Renfrew Family Services, Violence Against Women Program | Deep River |
| North Renfrew Family Services, Youth Program | Deep River |
| North Renfrew Health Campus, Deep River District Hospital, Deep River and District Hospital, Deep River and District Physiotherapy Centre | Deep River |
| North Renfrew Long Term Care Services, Deep River | Deep River |
| North Renfrew Long Term Care Services, Deep River, Adult Day Service | Deep River |
| North Renfrew Long Term Care Services, Deep River, In-Home Support | Deep River |
| North Renfrew Long Term Care Services, Deep River, Meals-on-Wheels | Deep River |
| North Renfrew Long Term Care Services, Deep River, Support for Caregivers | Deep River |
| North Renfrew Long Term Care Services, Deep River, Supportive Housing Short Stay / Respite | Deep River |
| North Renfrew Long Term Care Services, Deep River, Transportation | Deep River |
| North Renfrew Long Term Care Services, Stonecliffe, Wheels-to-Meals / Diner's Club | Head, Clara and Maria |
| North Renfrew Snowmobile Club | Deep River |
| North St Chiropractic, Stirling | Stirling |
| North Stormont. Municipal Offices, Berwick | Berwick |
| North Stormont. Municipal Offices, Berwick, Clerk's Department | Berwick |
| Northern Youth Abroad | Ottawa |
| Northumberland United Way | Cobourg |
| Northumberland United Way, Backpacks for Kids | Cobourg |
| Nouvelle Scène Gilles Desjardins (La) | Ottawa |
| Nova Children's Centre, Belleville, Child Care Centre | Belleville |
| Nunavut Sivuniksavut | Ottawa |
| Nurse Next Door, Cornwall - Head Office | Cornwall |
| Nurse Next Door, Brockville Branch | Brockville |
| Nurse Next Door, Kingston Branch | Kingston |
| Nurse Next Door, Ottawa | Ottawa |
| Nurse On Board | Ottawa |
| Nurse Practitioners' Association of Ontario | Toronto Downtown |
| Nursery Rhyme Childcare Centre | Smiths Falls |
| NutriChem Compounding Pharmacy & Retail Store, Ottawa - Carling Ave, Pharmacy | Ottawa |
| Nutrition Screening, Ontario - No Physical Address | Ontario |