| | Organization Name(s) | Located In |
 | Faherty DeMenezes Academy of Irish Dance | Niagara Falls |
| Fairhaven | Niagara Falls |
| Fairhaven, Adult Day Program | Niagara Falls |
| | Fairview Mall Walkers | St Catharines |
| Fairview Senior Citizen's Apartments | St Catharines |
| Faith Evangelical Lutheran Church | St Catharines |
| Faith in Christ Fellowship Church | Fort Erie |
| Faith Lutheran Villa | St Catharines |
| Faith Tabernacle (PAOC) | Welland |
| | Fall Prevention Network Niagara | St Catharines |
| Falls View Hose Brigade | Niagara Falls |
| | Family & Senior Home Services, Smithville Location | Smithville |
| Family and Children's Services Niagara (FACS), Niagara Falls | Niagara Falls |
| Family and Children's Services Niagara (FACS), St Catharines | St Catharines |
| Family and Children's Services Niagara (FACS), Welland | Welland |
| Family Counselling Centre Niagara, Niagara Falls | Niagara Falls |
| Family Counselling Centre Niagara, Niagara Falls, Walk-In Counselling Clinic | Niagara Falls |
| Family Counselling Centre Niagara, St Catharines | St Catharines |
| Family Counselling Centre Niagara, Welland | Welland |
| | Family Mental Health Support Network of Niagara | St Catharines |
| | Fare Share | Grimsby |
| Farm Credit Canada | Vineland |
| FAST - Fort Erie Accessible Specialized Transit | Fort Erie |
| Fathers Resources International, Hamilton Chapter | Hamilton Mountain West |
| | Federal Superannuates National Association, Niagara Peninsula Branch | St Catharines |
| | Feet First Nailcare | Grimsby |
| | Femaide, Ligne de soutien pour femmes victimes de violence | Toronto (City of) |
| Fenwick United Church | Fenwick |
| Fergie Jenkins Foundation, The | St Catharines |
| | Fetal Alcohol Support Group of Niagara | St Catharines |
| | Filipino-Canadian Association of Niagara | Niagara Falls |
| | Finally Friday Line Dancing | Niagara Falls |
| Financial Services Commission of Ontario | North York |
| Financial Services Commission of Ontario, Motor Vehicle Accident Claims Fund | Toronto (City of) |
| Findhelp Information Services | Toronto (City of) |
| | Fire Departments - Niagara Region, Administration | Niagara Region |
| | Firearms Education School | St Catharines |
| First Baptist Church, Beamsville | Beamsville |
| First Baptist Church, Fort Erie | Fort Erie |
| First Baptist Church, Niagara Falls | Niagara Falls |
| First Baptist Church, Thorold | Thorold |
| First Church of Christian Science, Christian Science Reading Room | St Catharines |
| First Evangelical Lutheran Church | Port Colborne |
| First Mennonite Church Vineland | Vineland |
| First Presbyterian Church | Port Colborne |
| First Presbyterian Church, St Davids | St David's |
| First Reformed Church of St Catharines | St Catharines |
| First Student Canada, The Link, Bus Transportation between St Catharines and Niagara-on-the-Lake | Virgil |
| | Fitness for Women, Over 65 | Niagara-on-the-Lake |
| | FITTogether, Land & Water Fitness Classes from Pregnancy to Preschool | St Catharines |
| FM-CFS Canada | Ottawa |
| | Focus on the Family | Jordan Station |
| Fonthill Baptist Church Nursery School Inc | Fonthill |
| Fonthill Montessori Preschool | Fonthill |
| Fonthill Seniors Non-Profit Accommodation, Town Square Manor | Fonthill |
| Fonthill United Church | Fonthill |
| Food and Commercial Workers Union, Julius Court | St Catharines |
| | Football Registration Information, Welland | Welland |
| | For the Needy - Not the Greedy | Niagara Falls |
| Forestview Community Church | Grimsby |
| Fort Erie Aboriginal Head Start | Fort Erie |
| Fort Erie Arts Council | Ridgeway |
| Fort Erie Conservation Club | Stevensville |
| Fort Erie Cooperative Nursery School | Fort Erie |
| Fort Erie Economic Development and Tourism Corporation | Fort Erie |
| Fort Erie Festivals | Fort Erie |
| Fort Erie Lafrance Association | Fort Erie |
| Fort Erie Meals on Wheels, Inc | Fort Erie |
| Fort Erie Multicultural Centre, Peace Bridge Newcomer Centre, St John's Learning Centre | Fort Erie |
| Fort Erie Museum Services, Fort Erie Historical Museum | Ridgeway |
| Fort Erie Museum Services, Fort Erie Railway Museum | Fort Erie |
| Fort Erie Native Friendship Centre | Fort Erie |
| Fort Erie Native Friendship Centre, Employment and Training Services | Fort Erie |
| Fort Erie Native Friendship Centre, Katkwenyes Literacy | Fort Erie |
| Fort Erie Native Friendship Centre, Under the Rainbow Child Care Centre | Fort Erie |
| Fort Erie Opti-Mrs/ Optimist Club | Fort Erie |
| Fort Erie Public Library, Centennial Branch | Fort Erie |
| Fort Erie Public Library, Crystal Ridge Branch | Ridgeway |
| Fort Erie Public Library, Stevensville Branch | Stevensville |
| Fort Erie Public Library, Summer Programs | Fort Erie |
| Fort Erie Public Transit | Fort Erie |
| Fort Erie Regional Child Care Centre | Fort Erie |
| Fort Erie Revolver and Gun Club | Fort Erie |
| Fort Erie Society for the Prevention of Cruelty to Animals | Fort Erie |
| Fort Erie Tennis Club | Fort Erie |
| Fort Erie Times, The | Fort Erie |
| Fort Erie. Town Of | Fort Erie |
| | Fort Erie. Town Of, Arenas, Pools and Recreation Facilities | Fort Erie |
| Fort Erie. Town Of, Municipal - Elected Officials | Fort Erie |
| Fort Erie. Town Of, Parks and Leisure Services | Fort Erie |
| Foster Counselling and Rehabilitation Associates | Fonthill |
| Foundation Fighting Blindness - Canada, The, National Office | Toronto (City of) |
| Foundation of Resources for Teens (FORT) | Grimsby |
| Foyer Richelieu Welland | Welland |
| | Frantastic Beginnings, Childbirth, Prenatal and Early Parenting Classes | St Catharines |
| | Fresh Air Fund, Niagara South | Port Colborne |
| Friends of Fort Erie's Creeks | Fort Erie |
| | Friends of Malcolmson Eco-Park | St Catharines |
| | Friends of Short Hills Park | Fonthill |
| | Friends of Stamford Village | Niagara Falls |
| | Friends of Twelve Mile Creek | St Catharines |
| Friends Over 55 Social Centre | Port Colborne |
| | Friendship Club | Niagara Falls |
| Fulton Community Centre | Smithville |
| Fun School of Music, The | Grimsby |
| FundScrip | Toronto |
| Fung Loy Kok Taoist Tai Chi, Niagara Branch, St Catharines Club | St Catharines |
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