| Sacre-Coeur Church, Georgetown | Georgetown |
| SAFE (Survivor Advocates for Empowerment), Victim & Survivor Support Services & Advocacy | Halton Region |
| Safetynet Children And Youth Charities | Oakville |
| Safetynet Children And Youth Charities, Free Tutoring | Oakville |
| Sahaja Yoga Meditation Network | Burlington |
| Saints Peter and Paul Serbian Orthodox Parish | Oakville |
| Sakeenah Canada (GTA), Mississauga Office, Sakeenah (Milton) | Mississauga |
| Salvation Army (The), Georgetown, Community and Family Services | Georgetown |
| Salvation Army (The), Acton, Community and Family Services | Acton |
| Salvation Army (The), Burlington - Mainway, Community and Family Services | Burlington |
| Salvation Army (The), Burlington Community Church | Burlington |
| Salvation Army (The), Oakville, Community and Family Services | Oakville |
| Salvation Army (The), Halton Lighthouse Emergency Shelter | Oakville |
| Salvation Army (The), Acton Community Church | Acton |
| Salvation Army (The), Acton, Food Bank | Acton |
| Salvation Army (The), Burlington - Mainway, Community and Family Services - Food Bank | Burlington |
| Salvation Army (The), Georgetown, Food Bank | Georgetown |
| Salvation Army (The), Georgetown Community Church | Georgetown |
| Salvation Army (The), Oakville, Food Bank | Oakville |
| Salvation Army (The), Oakville Community Church | Oakville |
| Salvation Army Ontario Division, Crisis / Hope Line | Hamilton |
| Salvation Army Thrift Store (The), Oakville Donor Welcome Centre & National Home Office | Oakville |
| Salvation Army Thrift Store (The), Acton - 130 Mill St E | Acton |
| Salvation Army Thrift Store (The), Burlington - Fairview St | Burlington |
| Salvation Army Thrift Store (The), Georgetown - Mill St | Georgetown |
| Salvation Army Thrift Store (The), Milton - Main St | Milton |
| Salvation Army Thrift Store (The), Oakville - Kerr St | Oakville |
| Salvation Army, Khi Community (The), Milton Community Church | Milton |
| Salvation Army, Khi Community (The), Milton Community Resource Centre, Infant Food Bank | Milton |
| Salvation Army, Khi Community (The), Milton, Community and Family Services | Milton |
| Salvation Army, Khi Community (The), Milton, Food Bank | Milton |
| Santa Maria Medical Centre, Family Practice and Walk-in Clinic | Milton |
| Santa Maria Pharmacy, Pharmacy Services | Milton |
| Saplings Early Learning & Child Care Centre, Licensed Child Care Centre | Acton |
| Scleroderma Society of Ontario, Scleroderma Society of Ontario Support Groups | Hamilton |
| Scouts Canada, Central Escarpment Council - Burlington Service Area | Burlington |
| Scouts Canada, Central Escarpment Council - Milton Service Area | Halton North |
| Scouts Canada, Central Escarpment Council - Oakville Service Area | Oakville |
| SE Health, Driver Assessment and Training | York Region |
| SE Health, Central West Mississauga Office, Home Care | Mississauga |
| Seasons Retirement Communities, Retirement Residence | Milton |
| Second Harvest, Food Rescue | Etobicoke |
| Senior Helpers, In-Home Care Services | Oakville |
| Senior Homecare By Angels, Hamilton, In Home Care Services | Stoney Creek |
| Senior Homecare by Angels, Milton, In-Home Care Services | Milton |
| Senior Necessities, Oakville, Mobile Haircare | Oakville |
| Seniors Life Enhancement Centres | Oakville |
| Seniors Life Enhancement Centres, Adult Day Program | Oakville |
| Seniors Life Enhancement Centres, Community Bathing Program | Oakville |
| Seniors Life Enhancement Centres, Foot Care | Oakville |
| Sensity Deafblind and Sensory Support Network of Canada, Paris - Main St | Paris |
| Serena Canada | Ottawa |
| Service Canada, Guelph, Service Canada Centre | Guelph |
| Service Canada, Social Insurance Registration Office | Bathurst |
| Service Canada, Office for Client Satisfaction (The) | Ottawa |
| Service Canada, Service Canada, Mississauga Service Canada Centre | Mississauga |
| Service Canada, Canadian Benefit for Parents of Young Victims of Crime | Ottawa |
| Service Canada, CPP International | Ottawa (City of) |
| Service Canada, Passport Canada | Ottawa |
| Service Canada, 1 800 O-Canada | Ottawa |
| Service Canada, Employment Insurance | Ottawa |
| Service Canada, Federal / Provincial / Territorial Ministers Responsible for Seniors Forum | Ottawa |
| Service Canada, Old Age Security Programs | Ottawa |
| Service Canada - Halton Region, Oakville, Federal Government Services | Oakville |
| Service Canada - Halton Region, Burlington, Federal Government Services | Burlington |
| Service Canada - Halton Region, Georgetown, Federal Government Services | Georgetown |
| Service Canada - Halton Region, Milton, Federal Government Services | Milton |
| Service Canada Hamilton Locations, Hamilton East Service Canada Centre and Passport Services, Canadian Passport Service | Hamilton |
| Service Canada Hamilton Locations, Hamilton Mountain Service Canada Centre and Passport Services | Hamilton |
| ServiceOntario, ServiceOntario, Brampton North Service Counter | Brampton |
| ServiceOntario, ServiceOntario, Brampton South Service Counter | Brampton |
| ServiceOntario, ServiceOntario, Mississauga - Dundas St W Service Counter | Mississauga |
| ServiceOntario, Accessible Parking Permit | Toronto |
| ServiceOntario, Office of the Registrar General | Toronto |
| ServiceOntario | Toronto |
| ServiceOntario, Silvercreek and Highway 6 (Guelph), Provincial Government Services | Guelph |
| ServiceOntario, Stone Road and Gordon (Guelph), Provincial Government Services | Guelph |
| ServiceOntario - Halton Region, Burlington - West Service Counter, Provincial Government Services | Burlington |
| ServiceOntario - Halton Region, Burlington - East Service Counter, Provincial Government Services | Burlington |
| ServiceOntario - Halton Region, Georgetown Service Counter, Provincial Government Services | Georgetown |
| ServiceOntario - Halton Region, Milton - Highpoint Service Counter, Provincial Government Services | Milton |
| ServiceOntario - Halton Region, Milton - Milton Mall Service Counter, Provincial Government Services | Milton |
| ServiceOntario - Halton Region, Oakville - Dorval Crossing East Service Counter, Provincial Government Services | Oakville |
| ServiceOntario - Halton Region, Oakville - Pacific Road Service Counter, Provincial Government Services | Oakville |
| ServiceOntario - Halton Region, Oakville - Staples Service Counter, Provincial Government Services | Oakville |
| ServiceOntario - Halton Region, Oakville - Trafalgar Village Service Counter, Provincial Government Services | Oakville |
| Sew On Fire Ministries | Burlington |
| Sex and Love Addicts Anonymous, Ontario Intergroup - Mailing Address | Toronto |
| Sexual Assault & Violence Intervention Services of Halton (SAVIS) | Oakville |
| Sexual Assault & Violence Intervention Services of Halton (SAVIS), Anti-Human Trafficking Services | Halton Region |
| Sexual Assault & Violence Intervention Services of Halton (SAVIS), Oakville - Rebecca St, Halton Collaborative Against Human Trafficking | Halton Region |
| Shaarei-Beth El Congregation, Reform Synagogue | Oakville |
| Shelter Movers Greater Toronto, Moving and Storage Support Service | Toronto |
| Shepherd Pharmacy, Pharmacy Services | Oakville |
| Shepherd Walk-in Clinic | Oakville |
| Sheridan College | Oakville |
| Sheridan College, Centre for Elder Research | Oakville |
| Sheridan College, Centre for Indigenous Learning and Support | Oakville |
| Sheridan College, Continuing and Professional Studies | Oakville |
| Sheridan College, Licensed Child Care Centre | Oakville |
| Sheridan College, Residence and Conference Centre | Oakville |
| Sheridan College, Academic Upgrading | Oakville |
| Sheridan College, Sheridan Student Union - Student Services | Oakville |
| Sheridan College, Theatre Sheridan | Oakville |
| Sheridan College Institute of Technology and Advanced Learning, Davis Campus, Academic Upgrading | Brampton |
| Shifa Cardiac Care, Mississauga | Mississauga |
| Shifra Homes, Maternity Residences | Burlington |
| Shikomu Karate Club | Burlington |
| Shoppers Drug Mart, Burlington - Maple Ave, Pharmacy Services | Burlington |
| Shoppers Drug Mart, Burlington - 3023 New St, Pharmacy Services | Burlington |
| Shoppers Drug Mart, Burlington Centre, Pharmacy Services | Burlington |
| Shoppers Drug Mart, Burlington - Plains Rd E, Pharmacy Services | Burlington |
| Shoppers Drug Mart, Burlington - Brant St, Pharmacy Services | Burlington |
| Shoppers Drug Mart, Burlington - Headon Rd, Pharmacy Services | Burlington |
| Shoppers Drug Mart, Burlington - Upper Middle Rd, Pharmacy Services | Burlington |
| Shoppers Drug Mart, Burlington - 4524 New St, Pharmacy Services | Burlington |
| Shoppers Drug Mart, Burlington - 3035 Appleby Line, Pharmacy Services | Burlington |
| Shoppers Drug Mart, Burlington - 2080 Appleby Line, Pharmacy Services | Burlington |
| Shoppers Drug Mart, Burlington - 3051 Walkers Line, Pharmacy Services | Burlington |
| Shoppers Drug Mart, Acton, Pharmacy Services | Acton |
| Shoppers Drug Mart, Georgetown - Guelph St, Pharmacy Services | Georgetown |
| Shoppers Drug Mart, Georgetown - Mountainview Rd S, Pharmacy Services | Georgetown |
| Shoppers Drug Mart, Milton - Derry Rd W, Pharmacy Services | Milton |
| Shoppers Drug Mart, Milton - Kennedy Circle, Pharmacy Services | Milton |
| Shoppers Drug Mart, Milton - Main St E, Pharmacy Services | Milton |
| Shoppers Drug Mart, Milton - Nipissing Rd, Pharmacy Services | Milton |
| Shoppers Drug Mart, Oakville - Cornwall Rd (Olde Oakville Marketplace), Pharmacy Services | Oakville |
| Shoppers Drug Mart, Oakville - Lakeshore Rd W, Pharmacy Services | Oakville |
| Shoppers Drug Mart, Oakville - Leighland Ave, Pharmacy Services | Oakville |
| Shoppers Drug Mart, Oakville - Third Line, Pharmacy Services | Oakville |
| Shoppers Drug Mart, Oakville - Dundas St W, Pharmacy Services | Oakville |
| Shoppers Drug Mart, Oakville - Kerr St, Pharmacy Services | Oakville |
| Shoppers Drug Mart, Oakville - Prince Michael Dr, Pharmacy Services | Oakville |
| Shoppers Drug Mart, Oakville - 1515 Rebecca St, Pharmacy Services | Oakville |
| Shoppers Drug Mart, Oakville - Upper Middle Rd, Pharmacy Services | Oakville |
| Shoppers Drug Mart, Oakville - 3535 Rebecca St, Pharmacy Services | Oakville |
| Shoppers Simply Pharmacy, Burlington - 2951 Walkers Line, Pharmacy Services | Burlington |
| Shoreacres Bible Chapel | Burlington |
| Sickle Cell Awareness Group of Ontario | North York |
| Side by Side Support for Seniors, In-Home Care Services | Oakville |
| Silent Voice Canada | Toronto Downtown North |
| Silver Cross, Stairlifts and Mobility Equipment | Oakville |
| Silver Maple Montessori Private School, Licensed Child Care Centre | Milton |
| Silver Services - Home Society (The) | Mississauga |
| Simply Local: Your Guide to Halton Farms | Oakville |
| SimplySmart Child Care Centre & Montessori, Oakville - Iroquois Shore Rd, Licensed Child Care Centre | Oakville |
| SimplySmart Child Care Centre & Montessori, Oakville - Winston Churchill Blvd, Licensed Child Care Centre | Oakville |
| Six Nations Polytechnic, Ohsweken - Fourth Line, Ohsweken Campus | Ohsweken |
| Skate Oakville | Oakville |
| Skiing, Snowboarding and Snowshoeing Locations, Halton Region | Ontario |
| Skill Builders Physiotherapy and Rehabilitation, Driver Assessment and Rehabilitation | Oakville |
| Sleepy Snuggles Early Learning & Childcare Centre, Licensed Child Care Centre | Milton |
| Slo Pitch Softball Leagues, Burlington | Burlington |
| Slo Pitch Softball Leagues, Oakville | Oakville |
| Slo-Pitch Ontario Association | St Catharines |
| Small Wunders Child Care Centre, Licensed Child Care Centre | Burlington |
| Smart Little Children Daycare Centre, Licensed Child Care Centre | Oakville |
| SMILE Canada, Support Services for Children and Youth | Mississauga |
| Smilezone Foundation | Oakville |
| Snow Angels Canada, London, Residential Snow Removal | London |
| Snow Clearing - Who Does What, Burlington | Burlington |
| Snow Clearing - Who Does What, Oakville | Oakville |
| Sobeys Pharmacy, Burlington - Brant St, Pharmacy Services | Burlington |
| Sobeys Pharmacy, Acton, Pharmacy Services | Acton |
| Sobeys Pharmacy, Oakville - Upper Middle Rd, Pharmacy Services | Oakville |
| Social Benefits Tribunal | Toronto |
| Social Security Tribunal, Social Security Tribunal of Canada | Ottawa |
| SocialliiASD, EmploymentWorks | Burlington |
| Society of Saint Vincent de Paul, Burlington Conferences, Church Volunteer Outreach | Burlington |
| Society of Saint Vincent de Paul, Milton - Holy Rosary Conference, Church Volunteer Outreach | Milton |
| Society of Saint Vincent de Paul, Milton - St Benedict Conference, Church Volunteer Outreach | Milton |
| Society of Saint Vincent de Paul, Oakville Conferences, Church Volunteer Outreach | Oakville |
| SOS First Aid, First Aid and Safety Training | Halton Region |
| Sound of Music Festival | Burlington |
| South Asian Canadians Health and Social Services, SACHSS Mental Health Services | Brampton |
| South Asian Legal Clinic of Ontario | Toronto |
| South Halton Amateur Radio Emergency Service Group | Milton |
| South Peel Naturalists' Club | Mississauga |
| Southern Ontario Lyric Opera | Burlington |
| Southern Ontario Sheltie Rescue Society | Burlington |
| Southside Community Church | Milton |
| Southside Community Church, English as a Second Language and English Conversation Circles | Milton |
| Special Investigations Unit | Mississauga |
| Special Needs Computer Solutions | St Catharines |
| Special Olympics Ontario, Halton Hills Community | Halton Hills |
| Special Olympics Ontario, Burlington Community - Mailing Address | Burlington |
| Special Olympics Ontario, Milton Community | Milton |
| Special Olympics Ontario, Oakville Community - Mailing Address | Oakville |
| Special Olympics Ontario | East York |
| Spectrum Health Care, Peel & Halton, Seniors for Seniors | Mississauga |
| Spectrum Health Care, Seniors for Seniors Driver Companions | Hamilton |
| Speech and Stuttering Institute | Toronto |
| Speech-Language & Audiology Canada | Ottawa |
| Speroway | Burlington |
| Spinal Cord Injury Ontario | North York Central |
| Spiritualist Society of Burlington | Burlington |
| Sport Dispute Resolution Centre of Canada, Canadian Sport Helpline | |
| Sport Oakville | Oakville |
| St Aidan's Anglican Church | Oakville |
| St Alban the Martyr Anglican Church, Acton | Acton |
| St Alban the Martyr Anglican Church, Glen Williams | Halton Hills |
| St Andrew Catholic Church | Oakville |
| St Andrew's United Church | Georgetown |
| St Anthony of Padua Polish Roman Catholic Church | Oakville |
| St Benedict Church | Milton |
| St Christopher's Anglican Church | Burlington |
| St Christopher's Anglican Church, Open Doors @ St Christophers | Burlington |
| St Christopher's Anglican Church, Open Doors @ St Christophers - Community Meals | Burlington |
| St Christopher's Co-operative Preschool, Licensed Child Care Centre | Burlington |
| St Clair Royal Arch Masons | Milton |
| St Cuthbert's Anglican Church and Community Centre | Oakville |
| St David's Presbyterian Church | Milton |
| St Dominic Roman Catholic Church | Oakville |
| St Gabriel Roman Catholic Church | Burlington |
| St George Medical Centre | Milton |
| St George Pharmacy, Burlington - Lakeshore Rd, Pharmacy Services | Burlington |
| St George Pharmacy, Milton, Pharmacy Services | Milton |
| St George's Anglican Church, Georgetown | Georgetown |
| St George's Anglican Church, Burlington | Burlington |
| St George's Anglican Church Lowville | Milton |
| St Hilda's ANiC Anglican Church | Oakville |
| St James Roman Catholic Church | Oakville |
| St John Ambulance - Halton Region, Oakville Office, First Aid Instruction, Supplies and Community Services | Oakville |
| St John Ambulance - Halton Region, Burlington Office | Burlington |
| St John Ambulance - Halton Region, Halton Hills Office | Georgetown |
| St John Ambulance - Halton Region, Milton Office | Milton |
| St John Ambulance - Halton Region, Therapy Dog Program | Halton Region |
| St John the Baptist Roman Catholic Parish | Burlington |
| St John's Anglican Church, Stewarttown | Georgetown |
| St John's Anglican Church, Burlington | Burlington |
| St John's Anglican Church, Campbellville | Milton |
| St John's United Church, Oakville | Oakville |
| St John's United Church of Georgetown and Glen Williams | Georgetown |
| St Joseph Medical Clinic, Walk-in Medical Clinic | Burlington |
| St Joseph Parish | Oakville |
| St Joseph Patron of Canada Roman Catholic Church, Acton - Church St E | Acton |
| St Joseph's Catholic Women's League, Acton - St Joseph Patron of Canada Catholic Church | Acton |
| St Joseph's Healthcare Hamilton, Burlington, Halton Seniors Mental Health Outreach Program | Burlington |
| St Joseph's Healthcare Hamilton, West Region, Ontario Structured Psychotherapy | Burlington |
| St Joseph's Ukrainian Catholic Church | Oakville |
| St Jude's Anglican Church | Oakville |
| St Leonard's Place Peel, Brampton | Brampton |
| St Luke's Anglican Church | Burlington |
| St Luke's Anglican Church, Community Lunch and Food Programs | Burlington |
| St Luke's Anglican Church, Palermo | Oakville |
| St Luke's Anglican Church, Palermo, Community Centre | Oakville |
| St Luke's Anglican Church, Palermo, Community Centre Facility Usage | Oakville |
| St Luke's Anglican Church, Palermo, Oakville, Nourishing Neighbours Food Bank | Oakville |
| St Luke's Close of Burlington, Seniors Apartments | Burlington |
| St Mathew's Mar Thoma Church | Milton |
| St Matthew Roman Catholic Parish | Oakville |
| St Michael's Catholic Church | Oakville |
| St Mildred's-Lightbourn School, Private Elementary/Secondary School | Oakville |
| St Patrick Roman Catholic Church | Burlington |
| St Paul the Apostle Roman Catholic Church | Burlington |
| St Paul's Anglican Church | Halton Hills |
| St Paul's Presbyterian Church | Burlington |
| St Paul's United Church, Milton | Milton |
| St Paul's United Church, Oakville | Oakville |
| St Raphael Roman Catholic Church | Burlington |
| St Simon's Anglican Church | Oakville |
| St Stephen's Anglican Church | Halton Hills |
| St Volodymyr Cultural Centre, Cultural Centre & Banquet Hall | Oakville |
| St Volodymyr Cultural Centre, All Saints of Ukraine Chapel | Oakville |
| St. Joseph's Healthcare Hamilton, Charlton Campus, Emergency Room Medical Care | Hamilton |
| St. Joseph's Healthcare Hamilton, Men's Addiction Service Hamilton (MASH) | Hamilton |
| St. Joseph's Healthcare Hamilton, Centre for Diabetes Care and Education | Hamilton |
| St. Joseph's Healthcare Hamilton, Womankind Addiction Service | Hamilton |
| Starlight Children's Foundation Canada | Québec |
| Start2Finish, Running & Reading Club | Oakville |
| STARTBoating | North York |
| Stephen Lewis Foundation - Grandmothers to Grandmothers Campaign, Oakville, Oomama | Halton Region |
| Stephen Lewis Foundation - Grandmothers to Grandmothers Campaign, Burlington, Burlington Ubuntu Grandwomen | Burlington |
| Stirling Montessori Academy, Licensed Child Care Centre | Milton |
| StL Diagnostic Imaging Mobile X-Ray and Ultrasound Services | Burlington |
| Stonehenge Therapeutic Community | Guelph |
| Stoney Creek Community Services Corporation, Bill Shackleton Place | Burlington |
| Stride, Milton - Head Office | Milton |
| Stride, Employment Peer Mentor Program | Halton Region |
| Stride, Integrated Employment Services | Halton Region |
| Stride, Oakville Office | Oakville |
| Stride, Supported Employment | Halton Region |
| Stroke Recovery Canada, Burlington Chapter | Burlington |
| Stroke Recovery Canada, Halton Stroke Fellowship | Burlington |
| Subject Tutoring and Homework Help Programs, Burlington | Burlington |
| Suffah Academy, Milton, Islamic Elementary School | Milton |
| Suffah Academy, Milton, Masjid Khadijah | Milton |
| Suite Melody Care | Oakville |
| suiteLiving360 Affordable Housing | Oakville |
| Summerhill Day School, Licensed Child Care Centre | Burlington |
| Summit Housing & Outreach Programs, Oakville, Supportive Housing & Outreach Programs | Oakville |
| Summit Housing & Outreach Programs, Case Management Supports | Halton Region |
| Summit Housing & Outreach Programs, Housing & Homelessness Supports | Halton Region |
| Summit Housing & Outreach Programs, Milton | Milton |
| Sunnybrook Health Sciences Centre, Toronto - Sunnybrook Health Sciences Centre, Bayview Campus | Toronto |
| Sunrise Senior Living, Sunrise of Burlington Retirement Residence | Burlington |
| Sunrise Senior Living, Retirement Residence | Oakville |
| Sunshine Foundation of Canada (The) | London |
| Support House, Housing Services | Oakville |
| Support House, Centre for Innovation in Peer Support | Oakville |
| Support House, Supportive Housing | Oakville |
| Support House, Community Health Centre Mobile Health Team | Oakville |
| Supreme Foot Care, Mobile Service, Mobile Nursing Footcare | Burlington |
| Sustainable Milton | Milton |
| Sweet Pea Daycare, Licensed Child Care Centre | Milton |
| Syrian Canadian Foundation (The), Mississauga | Mississauga |
| Syyidah Aysha Centre | Milton |
| Syyidah Aysha Centre, Milton Halal Food Bank | Milton |
