| S.H.I.F.T, Emergency Overnight Shelter Program | New Tecumseth |
| S.H.I.F.T, Daytime Drop-In Centre Program | New Tecumseth |
| S.H.I.F.T, Mobile Outreach Program | New Tecumseth |
| Sabine Cox, RP, Psychotherapy and Counselling | Innisfil |
| SafeCirc Newborn Circumcision Clinic | Barrie |
| Salvation Army (The), Collingwood Food Bank, Collingwood | Collingwood |
| Salvation Army (The), Hope Acres, Treatment Centre | Adjala-Tosorontio |
| Salvation Army Barrie, Barrie - Bayfield St, Community and Family Services | Barrie |
| Salvation Army Barrie, Barrie - Bayfield St, Family Emergency Shelter Program | Barrie |
| Salvation Army Barrie, Barrie - Bayfield St, Men's Emergency Shelter | Barrie |
| Salvation Army Barrie, Barrie - Essa Rd, Thrift Store | Barrie |
| Salvation Army Barrie, Barrie - Lillian Cres, Community Church | Barrie |
| Salvation Army Barrie, Barrie - Mulcaster St, Simcoe County and Muskoka District Bail Verification and Supervision Program | Barrie |
| Salvation Army Barrie, Gravenhurst, Simcoe County and Muskoka District Bail Verification and Supervision Program | Gravenhurst |
| Salvation Army Orillia Citadel (The), Christmas Hamper Program, Orillia - Coldwater Rd W | Orillia |
| Samaritan House | Barrie |
| Sandbox Centre, Barrie | Barrie |
| Science North, Mailing Address, Summer Day Camps | Simcoe County |
| SCORE Hockey League | Barrie |
| Scottish Connection | Barrie |
| Scottish Rite, Valley of Barrie, Valley of Barrie Scottish Rite | Barrie |
| Scouts Canada | Simcoe County |
| Seasons Centre for Grieving Children | Barrie |
| Seconds | Innisfil |
| SEIU Healthcare | Barrie |
| Senior Wish Association, Mailing Address | Barrie |
| Seniors for Seniors, Barrie | Barrie |
| Service Canada | Ontario |
| Service Canada, Barrie, Canada Pension Plan Disability Benefits | Barrie |
| Service Canada, Barrie, Canada Pension Plan Survivor's Benefits - Children's Benefit | Barrie |
| Service Canada, Barrie, Canada Pension Plan Survivor's Benefits - Death Benefits | Barrie |
| Service Canada, Barrie, Canada Pension Plan Survivor's Benefits - Survivor's Pension | Barrie |
| Service Canada, Barrie, Canada Pension Plan | Barrie |
| Service Canada, Barrie, Employment Insurance, Barrie | Barrie |
| Service Canada, Barrie, Old Age Security - Allowance for the Survivor | Barrie |
| Service Canada, Barrie, Old Age Security - Allowance | Barrie |
| Service Canada, Barrie, Old Age Security - Guaranteed Income Supplement | Barrie |
| Service Canada, Barrie, Old Age Security - Pension | Barrie |
| Service Canada, Barrie, Opportunities Fund for Persons with Disabilities | Barrie |
| Service Canada, Barrie, Service Canada Centre, Barrie | Barrie |
| Service Canada, Collingwood, Service Canada Centre | Collingwood |
| Service Canada Scheduled Outreach Site, Alliston, Federal Government Services | New Tecumseth |
| ServiceOntario, Alliston, Alliston Service Counter | New Tecumseth |
| ServiceOntario, Barrie - Bayfield St, Barrie (Bayfield St) Service Counter | Barrie |
| ServiceOntario, Barrie - Burton Ave, Barrie (Burton Ave) Service Counter | Barrie |
| ServiceOntario, Barrie - Simcoe St, Barrie (Simcoe St) Service Counter | Barrie |
| ServiceOntario, Barrie - Worsley St, Barrie Land Registry Office 51 | Barrie |
| ServiceOntario, Bradford, Bradford Service Counter | Bradford West Gwillimbury |
| ServiceOntario, Office of the Registrar General | Toronto |
| Sevenoaks Academy, Barrie | Barrie |
| Sexaholics Anonymous Ontario, Barrie - No Physical Address, Sexaholics Anonymous Barrie | Barrie |
| Sheba Shrine Club of Barrie, Sheba Shrine Club and Traditions Banquet Hall | Barrie |
| Shoebox Project for Women (The), Mailing Address, Simcoe and Grey County Chapter | Barrie |
| Simcoe / Muskoka Supervised Access Centre | Midland |
| Simcoe Childcare Services, Innisfil - 25th Sdrd, Before and After School Program | Innisfil |
| Simcoe Childcare Services, Innisfil - St Paul Rd | Innisfil |
| Simcoe Community Access Network Development Corporation | Barrie |
| Simcoe Contemporary Dancers, No Physical Address | Barrie |
| Simcoe County Airport Service | Barrie |
| Simcoe County Alliance to End Homelessness, New Tecumseth, South Simcoe Chapter | New Tecumseth |
| Simcoe County Archives | Springwater |
| Simcoe County Band | Barrie |
| Simcoe County Chess Club | Barrie |
| Simcoe County Child Care Committee | Simcoe |
| Simcoe County District School Board, Adult Learning and Continuing Education Department, Midhurst - Education Centre | Springwater |
| Simcoe County District School Board, Alliston - 46 Wellington St W, Unit 5, Simcoe Shores Secondary Schools | New Tecumseth |
| Simcoe County District School Board, Alliston Learning Centre Campus, Learning Centre, Alliston Learning Centre Campus | New Tecumseth |
| Simcoe County District School Board, Alliston Learning Centre Campus, Literacy and Basic Skills | New Tecumseth |
| Simcoe County District School Board, Angus, Simcoe Shores Secondary Schools | Essa |
| Simcoe County District School Board, Barrie Learning Centre, Adult English as a Second Language | Barrie |
| Simcoe County District School Board, Barrie Learning Centre, Learning Centre, Barrie Learning Centre | Barrie |
| Simcoe County District School Board, Bradford - 157 Holland St E, Unit 6A, Simcoe Shores Secondary Schools | Bradford West Gwillimbury |
| Simcoe County District School Board, Bradford Learning Centre Campus, Adult High School Diploma Program, Bradford Campus | Bradford West Gwillimbury |
| Simcoe County District School Board, Collingwood Learning Centre Campus, Simcoe Shores Secondary Schools | Collingwood |
| Simcoe County District School Board, Education Centre - Midhurst, Classroom Meeting Facilities | Midhurst |
| Simcoe County District School Board, Education Centre - Midhurst, Community Use of Schools, Meeting Facilities | Midhurst |
| Simcoe County District School Board, Education Centre - Midhurst, Trustees - Essa, CFB Borden, Adjala-Tosoronto | Midhurst |
| Simcoe County District School Board, Education Centre - Midhurst, Trustees - Innisfil | Midhurst |
| Simcoe County District School Board, Education Centre - Midhurst, Trustees - Native Communities Representative | Midhurst |
| Simcoe County District School Board, Education Centre - Midhurst, Trustees - New Tecumseth, Bradford West Gwillimbury | Midhurst |
| Simcoe County District School Board, Innisfil, Simcoe Shores Secondary Schools | Innisfil |
| Simcoe County District School Board, Learning Centre, Bradford Campus, Bradford Learning Centre Campus | Bradford West Gwillimbury |
| Simcoe County District School Board, Literacy and Basic Skills, Bradford Learning Centre Campus | Bradford West Gwillimbury |
| Simcoe County District School Board, Midhurst - Education Centre, Before and After School Programs | Springwater |
| Simcoe County District School Board, Midhurst - Education Centre | Springwater |
| Simcoe County District School Board, Newcomer Welcome Centre, Barrie Learning Centre | Barrie |
| Simcoe County District School Board, Ontario Youth Apprenticeship Program, Midhurst - Education Centre | Springwater |
| Simcoe County Embroidery Guild | Springwater |
| Simcoe County Federation of Agriculture, Simcoe County Administration Building | Springwater |
| Simcoe County Greenbelt Coalition, Mailing Address | Simcoe |
| Simcoe County Historical Association | Barrie |
| Simcoe County Home Builders' Association | Barrie |
| Simcoe County Housing Corporation, Angus, Angus Gardens Senior Citizens Complex | Angus |
| Simcoe County Law Association | Barrie |
| Simcoe County Law Association, Barrie, Simcoe County Law Library | Barrie |
| Simcoe County Master Gardeners | Springwater |
| Simcoe County Museum | Springwater |
| Simcoe County Quilters Guild | Springwater |
| Simcoe County Student Transportation Consortium | Barrie |
| Simcoe County Suicide Awareness Council, No Physical Address | Barrie |
| Simcoe County Young Professionals Association | Barrie |
| Simcoe County, Corporation of, Barrie Satellite Office, Ontario Works | Barrie |
| Simcoe County, Corporation of, Bradford West Gwillimbury Transfer Station, Solid Waste Management Department - Waste Facilities | Bradford West Gwillimbury |
| Simcoe County, Corporation of, Children and Community Services - LEAP Program, Midhurst Administration Centre | Springwater |
| Simcoe County, Corporation of, Children Services, Midhurst Administration Centre | Springwater |
| Simcoe County, Corporation of, Collingwood Landfill Site 2, Solid Waste Management Department - Waste Facilities | Collingwood |
| Simcoe County, Corporation of, Collingwood Satellite Office, Ontario Works | Collingwood |
| Simcoe County, Corporation of, Elmvale, Long Term Care and Seniors Services - Adult Day Program | Springwater |
| Simcoe County, Corporation of, Mara Transfer Station - Site 7, Solid Waste Management Department - Waste Facilities | |
| Simcoe County, Corporation of, Matchedash Transfer Station, Solid Waste Management Department - Waste Facilities | Severn |
| Simcoe County, Corporation of, Midhurst Administration Centre, One-time top-up to the Canada Housing Benefit | Springwater |
| Simcoe County, Corporation of, Midhurst Administration Centre, Ontario Works | Springwater |
| Simcoe County, Corporation of, Midhurst, Tourism Simcoe County | Springwater |
| Simcoe County, Corporation of, Midland Satellite Office, Ontario Works | Midland |
| Simcoe County, Corporation of, North Simcoe Transfer Station and Recycling Facility, Solid Waste Management Department - Waste Facilities | Midland |
| Simcoe County, Corporation of, Nottawasaga Landfill Site 10, Solid Waste Management Department - Waste Facilities | Clearview (Simcoe County) |
| Simcoe County, Corporation of, Orillia Satellite Office, Ontario Works | Orillia |
| Simcoe County, Corporation of, Oro Landfill, Solid Waste Management Department - Waste Facilities | Oro-Medonte |
| Simcoe County, Corporation of, Paramedic Services, Midhurst Administration Centre | Springwater |
| Simcoe County, Corporation of, Penetanguishene, Long Term Care and Seniors Services - Adult Day Program | Penetanguishene |
| Simcoe County, Corporation of, Social and Community Services Division, Midhurst Administration Centre | Springwater |
| Simcoe County, Corporation of, Social Housing - Home Ownership Program, Midhurst Administration Centre | Springwater |
| Simcoe County, Corporation of, Social Housing - Housing Retention Program, Midhurst Administration Centre | Springwater |
| Simcoe County, Corporation of, Social Housing Department, Midhurst Administration Centre | Springwater |
| Simcoe County, Corporation of, Solid Waste Management Department - Green Bin / Organics Program, Midhurst Administration Centre | Springwater |
| Simcoe County, Corporation of, Solid Waste Management Department - Household Hazardous Waste, Midhurst Administration Centre | Springwater |
| Simcoe Huronia Home Services | Barrie |
| Simcoe Muskoka Catholic District School Board, Barrie - Alliance Blvd, Catholic Education Centre | Barrie |
| Simcoe Muskoka Catholic District School Board, Barrie - Alliance Blvd, Ontario Youth Apprenticeship Program | Barrie |
| Simcoe Muskoka Catholic District School Board, Barrie - Alliance Blvd, Community Use of Schools | Barrie |
| Simcoe Muskoka District Health Unit, Alliston - 13 Wellington St W, Breastfeeding Place | New Tecumseth |
| Simcoe Muskoka District Health Unit, Barrie - 80 Bradford St, Dental Screening and Dental Clinics | Barrie |
| Simcoe Muskoka District Health Unit, Barrie - 80 Bradford St, Sexual Health Counselling, Education and Clinic Services | Barrie |
| Simcoe Muskoka District Health Unit, Barrie Head Office - 15 Sperling Dr | Barrie |
| Simcoe Muskoka District Health Unit, Bradford - 425 Holland St W, Breastfeeding Place | Bradford West Gwillimbury |
| Simcoe Muskoka District Health Unit, Cookstown Branch - 25 King St S, Clinical Service | Innisfil |
| Simcoe Muskoka District Health Unit, Cookstown Branch - 25 King St S, Community and Family Health Department | Innisfil |
| Simcoe Muskoka District Health Unit, Cookstown Branch - 25 King St S, Environmental Health Department | Innisfil |
| Simcoe Muskoka District Health Unit, Cookstown Branch - 25 King St S, Healthy Babies Healthy Children Program | Innisfil |
| Simcoe Muskoka District Health Unit, Cookstown Branch - 25 King St S, Immunization Clinic | Innisfil |
| Simcoe Muskoka District Health Unit, Cookstown Branch - 25 King St S, Parenting Support | Innisfil |
| Simcoe Muskoka District Health Unit, Cookstown Branch - 25 King St S, Prenatal Classes | Innisfil |
| Simcoe Muskoka District Health Unit, Cookstown Branch - 25 King St S | Cookstown |
| Simcoe Muskoka District Health Unit, Gravenhurst Branch - 5 Pineridge Gate, Dental Screening and Dental Clinics | Gravenhurst |
| Simcoe Muskoka Family Connexions, Barrie Office, Child Welfare, Adoption and Foster Care Services | Barrie |
| Simcoe Muskoka Family Connexions, Barrie Office, Communications, Community Relations and Fundraising | Barrie |
| Simcoe Muskoka Opioid Strategy, Online / Web Service | Barrie |
| Simcoe Muskoka Skillforce, Barrie, Literacy and Basic Skills Support Organization | Barrie |
| Simcoe Muskoka Skillforce, Barrie, Simcoe Muskoka Local Board | Barrie |
| Simcoe Peer Support for Mental Health and Addictions | Collingwood |
| Simcoe Peer Support for Mental Health and Addictions, Collingwood | Collingwood |
| Simcoe Peer Support for Mental Health and Addictions, People Supporting People, Collingwood | Collingwood |
| Simcoe Urban Native Housing | Barrie |
| Simcoe Urban Native Housing, Barrie, Rising SUN Women's Support Group | Barrie |
| Simcoe Village Apartments, Supportive Housing | New Tecumseth |
| Sir Frederick Banting Legacy Foundation, Banting Homestead Heritage Park, Diabetes Management and Education Centre | New Tecumseth |
| Ski Snow Valley | Springwater |
| Skill Builders Physiotherapy & Rehabilitation Centre | Barrie |
| Smiles4miles, Mobile Service, Mobile/Onsite Dental Hygiene Clinic | Aurora |
| Social Benefits Tribunal | Toronto |
| Society of Saint Vincent de Paul, Barrie - Amelia St, St Mary's Conference | Barrie |
| Society of Saint Vincent de Paul, Barrie - Baldwin Lane, St John Vianney Conference | Barrie |
| Society of Saint Vincent de Paul - Guardian Angels Conference, Orillia, Food Bank | Orillia |
| Society of St Vincent de Paul | Collingwood |
| Society of St Vincent de Paul, Alliston, St Paul's Alliston Conference | Alliston |
| Society of St Vincent de Paul, Collingwood, St Mary's Conference | Collingwood |
| Society of St Vincent de Paul, Midland, St Margaret's Conference, Food Pantry | Midland |
| Society of St Vincent de Paul, Penetanguishene, St Ann's Conference | Penetanguishene |
| Society of St. Vincent de Paul - St Patrick's / St Noel Chabanel Conference, Christmas Assistance, Wasaga Beach | Wasaga Beach |
| South Asian Association of Simcoe County | Barrie |
| South Simcoe Arts Council | New Tecumseth |
| South Simcoe Dufferin Track and Field Club | Barrie |
| South Simcoe Ladies Fast Pitch League, Simcoe County - No Physical Address | Simcoe |
| South Simcoe Medical Walk-in Clinic | Bradford West Gwillimbury |
| South Simcoe Police, Bradford - South Division | Bradford West Gwillimbury |
| South Simcoe Police, Innisfil - North Division | Innisfil |
| South Simcoe Rebel Rollers Roller Derby League | Orillia and area |
| South Simcoe Streams Network | New Tecumseth |
| South Simcoe Theatre (The), Cookstown Town Hall | Innisfil |
| Special Olympics Ontario - Central Ontario, South Simcoe - Mailing Address, Special Olympics Ontario - South Simcoe Chapter | New Tecumseth |
| Specialty Transportation By Park Place Plus, Mailing Address | New Tecumseth |
| Spinal Cord Injury Ontario [Central East], Barrie, Barrie Regional Office | Barrie |
| Springbrook Montessori Academy | Essa |
| St Andrew Anglican Church, Alliston, Alliston, St Andrews Anglican Church | New Tecumseth |
| St Andrew's Society of Simcoe County, Mailing Address | Barrie |
| St John Ambulance, Barrie Simcoe Muskoka, Babysitting and Home Alone Courses | Barrie |
| St John Ambulance, Barrie Simcoe Muskoka, Car Seat Education | Barrie |
| St John Ambulance, Barrie Simcoe Muskoka, First Aid Training | Barrie |
| St John Ambulance, Barrie Simcoe Muskoka, Therapy Dog Program | Barrie |
| St John Ambulance Therapy Dogs, New Tecumseth 1169 Branch | New Tecumseth |
| St John's Anglican Church, Cookstown | Innisfil |
| St John's Presbyterian Church, Bradford | Bradford West Gwillimbury |
| St John's United Church, Alliston | New Tecumseth |
| St Joseph Roman Catholic Chapel, CFB Borden | Adjala-Tosorontio |
| St Paul the Apostle Catholic Church, Alliston | New Tecumseth |
| St Paul's Anglican Church, Barrie | Barrie |
| St Paul's United Church, Outreach and Community Support, Midland | Midland |
| STEM Camp, Barrie | Barrie |
| Stepping Stones, Speech & Language Services, Angus | Essa |
| Stevenson Memorial Hospital, Obstetrics | New Tecumseth |
| Stevenson Memorial Hospital, Mary McGill Community Mental Health Program | New Tecumseth |
| Stevenson Memorial Hospital | New Tecumseth |
| Story Book Meadows, Equine Assisted Learning and Life Coaching Programs | Adjala-Tosorontio |
| Street Cats Rescue | Barrie |
| Stroke Recovery Association Barrie and District | Barrie |