| | Organization Name(s) | Located In |
 | Sacred Heart Day Nursery | Welland |
| Sacred Heart Roman Catholic Church | Chippawa |
| Safari Niagara | Stevensville |
| Safe Communities Port Colborne | Port Colborne |
| Safetynet Children & Youth Charities, Safetynet Residential Services | Smithville |
| Sages-Femmes Renaissance Midwifery | Welland |
| Saint Elizabeth, Complex and Catastrophic Rehabilitation | St Catharines |
| Saint Elizabeth Health Care, Hamilton, Niagara, Haldimand-Norfolk, Brant and Burlington | Hamilton Mountain East |
| Salvation Army Booth Centre, The | St Catharines |
| Salvation Army Booth Centre, The, Correctional and Justice Services | St Catharines |
| Salvation Army Booth Centre, The, Family Tracing | St Catharines |
| Salvation Army Booth Centre, The, Federal Halfway House | St Catharines |
| Salvation Army Booth Centre, The, Supported Transitional Housing | St Catharines |
| Salvation Army Church, The | St Catharines |
| Salvation Army Community and Family Services, Fort Erie | Fort Erie |
| Salvation Army Community and Family Services, Niagara Falls | Niagara Falls |
| | Salvation Army Community and Family Services, Niagara Mobile Outreach Program | St Catharines |
| Salvation Army Community and Family Services, Port Colborne | Port Colborne |
| Salvation Army Community and Family Services, St Catharines | St Catharines |
| Salvation Army Community and Family Services, Welland | Welland |
| Salvation Army Family Thrift Store, Thrift Shop, Fort Erie | Fort Erie |
| Salvation Army Family Thrift Store, Thrift Shop, Niagara Falls | Niagara Falls |
| Salvation Army Family Thrift Store, Thrift Shop, Port Colborne | Port Colborne |
| Salvation Army Family Thrift Store, Thrift Shop, St Catharines | St Catharines |
| Salvation Army Family Thrift Store, Thrift Shop, Welland | Welland |
| Salvation Army, the Honourable Ray and Helen Lawson Eventide Home | Niagara Falls |
| Samaritan's Purse, Operation Christmas Child | St Catharines |
| | Santa Claus Parades | Niagara Region |
| Save the Children Canada | Toronto (City of) |
| Schizophrenia Society of Ontario, Niagara Chapter | St Catharines |
| School of Dramatic Arts (SODA) | Niagara Falls |
| School of Philosophy | St Catharines |
| | Scientists in School | Pelham |
| Scorpions Niagara Cheerleading, Competitive and Recreational All-Star Cheerleading Program | Welland |
| Scott Manor Residence | St Catharines |
| Scott Street Mennonite Brethren Church | St Catharines |
| Scottish Club of St Catharines | St Catharines |
| Scottlea Presbyterian Church | St Catharines |
| Scouts Canada | London |
| Scouts Canada, Camp Wetaskiwin | St Catharines |
| Seasons First Avenue Retirement Residence | Welland |
| Seaway Mall Walkers | Welland |
| Secret Place Christian Fellowship, The | Niagara Falls |
| Segue Clinic, Niagara Falls | Niagara Falls |
| Segue Clinic, St Catharines | St Catharines |
| Segue Clinic, Welland | Welland |
| Seido Kan Karate Schools | Niagara Falls |
| | Select Nannies Inc | St Catharines |
| SelectMD Urgent Care Health and Wellness Centre | Welland |
| Self-Help Resource Centre, The | Toronto (City of) |
| Senior Citizen's Complex | Crystal Beach |
| Seniors for Seniors | Hamilton Central |
| Seniors Review, The | St Catharines |
| Sensible Office Services | St Catharines |
| | Sertoma Club | Niagara Falls |
| | Sex and Love Addicts Anonymous | St Catharines |
| Sexual Assault/Domestic Violence Treatment Program - Niagara | St Catharines |
| Sexual Assault/Domestic Violence Treatment Program - Niagara, Counselling & Follow-up Services | St Catharines |
| Shake Rattle and Roll Studio Featuring Kindermusik | Niagara Falls |
| Shalom Manor, Shalom Gardens Apartments | Grimsby |
| Shalom Manor Long Term Care Home, Long Term Care Home | Grimsby |
| | Sharon Berry - Hairstylist in the Comfort of Your Home | Niagara Falls |
| Shaw Festival | Niagara-on-the-Lake |
| | Shaw Guild, The | Niagara-on-the-Lake |
| Shaw Theatre Festival, Summer Day Camp for Children and Youth | St Catharines |
| Shaw Theatre Festival, Theatre School for Children and Youth | Niagara-on-the-Lake |
| Sherkston United Church | Sherkston |
| Sherry Campbell Counselling Group | Jordan |
| Sherwood Farm, Summer Camp | St Catharines |
| Shoppers Home Health Care | St Catharines |
| Short Hills Villa Retirement Community | Fonthill |
| Silver Cross | St Catharines |
| Silver Spire United Church | St Catharines |
| Simone's Piano Studio | Niagara-on-the-Lake |
| Simpson's Pharmasave, Home Health Care | Virgil |
| | Sing Niagara | St Catharines |
| | Single Person Association of Niagara (SPAN) | Fonthill |
| Skerrett Psychology Professional Corporation | Fort Erie |
| Skydive Burnaby | Wainfleet |
| Slo-Pitch Ontario Association | St Catharines |
| Slovenian National Home and Cultural Centre - Lipa Park | St Catharines |
| Smithville Medical Centre Family Health Team | Smithville |
| Smithville Presbyterian Church, Smithville | Smithville |
| | Society of Ontario Freethinkers, Niagara Region | Niagara Region |
| | Society of St Vincent de Paul | Niagara Region |
| Society of St Vincent de Paul, Thrift Shop, Fort Erie | Fort Erie |
| Society of St Vincent de Paul, Thrift Shop, St Catharines | St Catharines |
| Society of St Vincent de Paul, Thrift Shop, Welland | Welland |
| | Soroptimist International, Stoney Creek-Niagara | Stoney Creek |
| South Niagara Community Futures Development Corporation | Port Colborne |
| South Niagara Gateway Family Homes | Port Colborne |
| South Niagara Life Centre Ministries | Fort Erie |
| Southern Ontario Aboriginal Diabetes Initiative (SOADI), Niagara Region | Thorold |
| Southminster United Church | Niagara Falls |
| Southridge Community Church | St Catharines |
| Southridge Community Church, Emergency Shelter | St Catharines |
| Southridge Community Church, Vineland Location | Vineland |
| | Sparklz Baton Twirling Club | Welland |
| | Special Fashions | St Catharines |
| Special Needs Computers | St Catharines |
| Special Olympics Ontario, Niagara and Haldimand County | Toronto (City of) |
| Speech Services Niagara, SS Niagara, Preschool Speech and Language and Emergent Literacy Service System of Niagara | St Catharines |
| | Spina Bifida and Hydrocephalus Association of Ontario, Support & Information | Toronto (City of) |
| | Spiritual Assembly of Baha'i, Niagara Falls | Niagara Falls |
| Sport by Ability Niagara (SBAN) | St Catharines |
| Sports Medic Event Medical Services | Niagara-on-the-Lake |
| St Alban's Anglican Church | Beamsville |
| St Alexander Roman Catholic Church | Fonthill |
| St Alfred's Roman Catholic Church | St Catharines |
| St Aloysius Roman Catholic Church | Thorold |
| St Andrew the Apostle Roman Catholic Church | Welland |
| St Andrew's - Knox Presbyterian Church | Fort Erie |
| St Andrew's Presbyterian Church, Beamsville | Beamsville |
| St Andrew's Presbyterian Church, Niagara-on-the-Lake | Niagara-on-the-Lake |
| St Andrew's Presbyterian Church, Thorold | Thorold |
| | St Andrew's Society of Niagara | Niagara-on-the-Lake |
| St Andrew's United Church, Niagara Falls | Niagara Falls |
| St Andrew's United Church, Port Dalhousie | Port Dalhousie |
| St Ann's Roman Catholic Church | Fenwick |
| St Anthony Croatian Catholic Church | Welland |
| St Antoine de Padoue Roman Catholic Church / Paroisse S Antoine-de-Padoue | Niagara Falls |
| St Augustine of Canterbury Roman Catholic Church | Welland |
| St Barnabas Anglican Church | St Catharines |
| St Catharines and Area Aquarium Society (SCAAS) | Thorold |
| | St Catharines and District Council of Women | St Catharines |
| | St Catharines and District Kennel and Obedience Club Inc | St Catharines |
| St Catharines and District Retirees Association | St Catharines |
| | St Catharines and District Shrine Club | St Catharines |
| | St Catharines and Regional Niagara Twinning Association | St Catharines |
| | St Catharines Athletics Minor Lacrosse | St Catharines |
| | St Catharines Badminton Club | St Catharines |
| | St Catharines Business Club | St Catharines |
| | St Catharines Chess Club | St Catharines |
| St Catharines Christian Centre | St Catharines |
| St Catharines Concord Soccer Club | St Catharines |
| St Catharines Curling Club | St Catharines |
| | St Catharines Cycling Club | St Catharines |
| | St Catharines CYO Minor Hockey Association | St Catharines |
| | St Catharines CYO Rebels Basketball | St Catharines |
| St Catharines Downtown Association | St Catharines |
| St Catharines Enterprise Centre | St Catharines |
| St Catharines Flying Club | Niagara-on-the-Lake |
| St Catharines Game and Fish Association | St Catharines |
| St Catharines General Hospital Auxiliary, The | St Catharines |
| St Catharines General Hospital Foundation, The | St Catharines |
| St Catharines Jets Girls Soccer Club | St Catharines |
| | St Catharines Junior A Lacrosse | St Catharines |
| St Catharines Kendo Club | St Catharines |
| | St Catharines Ladies Softball League | St Catharines |
| | St Catharines Minor Baseball Association, Cobra Baseball | St Catharines |
| St Catharines Minor Hockey School Inc | St Catharines |
| St Catharines Museum & Welland Canals Centre, Lock 3 | St Catharines |
| | St Catharines Old Timers Hockey League | St Catharines |
| | St Catharines Photographic Club | St Catharines |
| St Catharines Place Retirement Residence, Seniors Hospitality Resort | St Catharines |
| St Catharines Playschool | St Catharines |
| St Catharines Public Library, Central Library | St Catharines |
| St Catharines Public Library, Dr Huq Family Library Branch | St Catharines |
| St Catharines Public Library, Port Dalhousie Branch | Port Dalhousie |
| St Catharines Public Library, William Hamilton Merritt Branch | St Catharines |
| St Catharines Rankin Construction Falcons | St Catharines |
| St Catharines Regional Child Care Centre | St Catharines |
| St Catharines Right to Life Association Inc | St Catharines |
| | St Catharines Ringette Association | St Catharines |
| | St Catharines Roadrunners and Walkers | St Catharines |
| St Catharines Roma Soccer | St Catharines |
| | St Catharines Rowing Club | St Catharines |
| | St Catharines Softball Association | St Catharines |
| | St Catharines Stamp Club | St Catharines |
| St Catharines Standard | St Catharines |
| | St Catharines Summer Minor Hockey League | St Catharines |
| | St Catharines Touch Football Association | St Catharines |
| St Catharines Transit Commission | St Catharines |
| St Catharines United Mennonite Church | St Catharines |
| St Catharines. City Of | St Catharines |
| | St Catharines. City Of, Arenas, Pools and Recreation Facilities | St Catharines |
| St Catharines. City Of, Civil Marriage Ceremonies | St Catharines |
| | St Catharines. City of, Culture Committee | St Catharines |
| St Catharines. City Of, Economic Development & Tourism Services | St Catharines |
| St Catharines. City Of, Municipal - Elected Officials | St Catharines |
| St Catharines. City Of, Public Art Advisory Committee | St Catharines |
| St Catharines. City Of, Recreation and Community Services Department | St Catharines |
| St Catharines. City Of, Recreation and Community Services Department, Band Concerts | St Catharines |
| St Catharines. City Of, Recreation and Community Services Department, Happy Rolph's Bird Sanctuary and Children's Petting Farm | St Catharines |
| St Catharines. City Of, Recreation and Community Services Department, Lakeside Park Carousel | Port Dalhousie |
| St Catharines. City Of, Recreation and Community Services Department, Morningstar Mill | St Catharines |
| St Catharines. City Of, Recreation and Community Services Department, Port Weller Community Centre | St Catharines |
| St Catharines. City Of, Recreation and Community Services Department, Russell Avenue Community Centre | St Catharines |
| St Catharines. City Of, Recreation and Community Services Department, Seymour-Hannah Sportsplex & Entertainment Centre | St Catharines |
| St Catharines. City Of, Recreation and Community Services Department, West St Catharines Seniors' Centre | St Catharines |
| St Charles Village | Welland |
| St Columba Anglican Church | St Catharines |
| | St David's and Queenston Senior Citizens Association | Niagara-on-the-Lake |
| St David's Anglican Church, Welland | Welland |
| St David's Co-op Nursery School | Welland |
| St Davids-Queenston United Church | St David's |
| St Denis Roman Catholic Church | St Catharines |
| St Elizabeth Roman Catholic Church | Wainfleet |
| St George Catholic Church | Crystal Beach |
| St George Serbian Orthodox Church | Niagara Falls |
| St George's Anglican Church | St Catharines |
| St George's Anglican Church, Breakfast Program | St Catharines |
| St George's Anglican Church, Homer | Niagara-on-the-Lake |
| St Giles Presbyterian Church | St Catharines |
| St Giles Presbyterian Church, Youth Group | St Catharines |
| St Gregory Armenian Apostolic Church | St Catharines |
| St Helen's Roman Catholic Parish | Vineland |
| St James and St Brendan Anglican Church | Port Colborne |
| St James Anglican Church | St Catharines |
| St John Ambulance, Lincoln County Branch | St Catharines |
| St John Ambulance, Niagara Falls | Niagara Falls |
| St John Ambulance, Search and Rescue Niagara | Welland |
| St John the Evangelist Anglican Church, Thorold | Thorold |
| St John Ukrainian Catholic Church | St Catharines |
| St John's Anglican Church, Stevensville | Fort Erie |
| St John's Greek Catholic Church | Welland |
| St John's Lutheran Church, Snyder | Stevensville |
| St John's Stevensville United Church | Stevensville |
| | St Joseph's Healthcare Hamilton, Best Foot Forward, Niagara Region | Niagara Region |
| St Joseph's Healthcare Hamilton, King Campus, Continence Program, Continence Care Clinic, Niagara Region | St Catharines |
| St Joseph's Healthcare Hamilton, Niagara Geriatric Mental Health Outreach Program | St Catharines |
| St Joseph's Healthcare Hamilton, West 5th Campus | Hamilton Mountain West |
| St Joseph's Healthcare Hamilton, West 5th Campus, Schizophrenia and Community Integration Service, Homes for Special Care Program | Hamilton Mountain West |
| St Joseph's Roman Catholic Church, Grimsby | Grimsby |
| St Joseph's Roman Catholic Church, Stevensville | Stevensville |
| St Julia's Roman Catholic Church | St Catharines |
| St Kevin's Roman Catholic Church | Welland |
| St Kevin's Roman Catholic Church, Youth Ministry | Welland |
| St Lawrence Seaway Authority, Niagara Region | St Catharines |
| St Leonard's Community Services, Dunnville Employment Centre | Dunnville |
| St Luke's Anglican Church | Smithville |
| St Mark's Anglican Church | Niagara-on-the-Lake |
| St Martin of Tours Roman Catholic Church | Smithville |
| St Mary of the Assumption Roman Catholic Church | St Catharines |
| St Mary's Roman Catholic Church | Welland |
| St Mary's Ukrainian Catholic Church | Niagara Falls |
| St Matthew's Evangelical Lutheran Church, Welland | Welland |
| St Michael the Archangel Ukrainian Catholic Church | Welland |
| St Michael's Roman Catholic Church | Fort Erie |
| St Patrick's Roman Catholic Church, Niagara Falls | Niagara Falls |
| St Patrick's Roman Catholic Church, Port Colborne | Port Colborne |
| St Patrick's Roman Catholic Church, St Catharines | St Catharines |
| St Paul's Anglican Church, Fort Erie | Fort Erie |
| St Peter and St Paul Ukrainian Orthodox Church | Niagara Falls |
| St Peter's Lutheran Church | Port Colborne |
| St Saviour's Anglican Church | Queenston |
| St Therese of Lisieux Roman Catholic Church | Port Colborne |
| St Thomas' Anglican Church | St Catharines |
| St Thomas Aquinas Roman Catholic Church | St Catharines |
| St Thomas' Childrens Day Care Centre | St Catharines |
| St Vincent de Paul Roman Catholic Church | Niagara-on-the-Lake |
| St Vincent de Paul Roman Catholic Church, Youth Group | Niagara-on-the-Lake |
| Stamford Centre Volunteer Firemen's Association | Niagara Falls |
| Stamford Estates, Retirement Residence | Niagara Falls |
| Stamford Green Day Nursery | Niagara Falls |
| Stamford Green Heritage Columbarium | Niagara Falls |
| | Stamford Kiwanis Non-Profit Homes Inc | St Catharines |
| Stamford Presbyterian Church | Niagara Falls |
| Stamford United Church | Niagara Falls |
| Star of the Sea Roman Catholic Church | St Catharines |
| Starlight Children's Foundation | Toronto |
| Start Me Up Niagara | St Catharines |
| Statistics Canada, Advisory Services, Central Region | Toronto (City of) |
| | Stealin' Time | Fonthill |
| Stepping Stones to School Preschool | Grimsby |
| Stevensville Garden Gallery, Easter Egg Hunt | Stevensville |
| Stevensville United Brethren Church | Stevensville |
| | Stick 'n Needles, Stitching Guild of Niagara | Niagara Falls |
| Stokes Community Village | St Catharines |
| Stonehenge Therapeutic Community | Guelph-Eramosa |
| Stratford Festival, The | Stratford |
| Sts Peter and Paul Roman Catholic Church | Welland |
| Sunshine Foundation of Canada | London |
| Survivor Support Programme | Toronto (City of) |
| | Survivors of Stroke Niagara (SOS), Niagara Chapters | Niagara Region |
| Susan Dube's Music Studio | Welland |
| | Suzuki Niagara | St Catharines |
Map Results