| Township of Southwold | Municipalities & Services | 2025 | 8 | $135,589 |
| Township of Springwater | Municipalities & Services | 2025 | 27 | $127,201 |
| Township of St. Clair | Municipalities & Services | 2025 | 20 | $132,731 |
| Township of Stirling-Rawdon | Municipalities & Services | 2025 | 8 | $128,917 |
| Township of Stone Mills | Municipalities & Services | 2025 | 5 | $117,517 |
| Township of Strathroy-Caradoc | Municipalities & Services | 2025 | 45 | $128,131 |
| Township of Strong | Municipalities & Services | 2025 | 4 | $120,192 |
| Township of Tay | Municipalities & Services | 2025 | 17 | $131,554 |
| Township of Tehkummah | Municipalities & Services | 2025 | 1 | $103,005 |
| Township of Terrace Bay | Municipalities & Services | 2025 | 3 | $111,707 |
| Township of the Archipelago | Municipalities & Services | 2025 | 13 | $147,174 |
| Township of Tiny | Municipalities & Services | 2025 | 23 | $128,851 |
| Township of Tyendinaga | Municipalities & Services | 2025 | 1 | $132,876 |
| Township of Uxbridge | Municipalities & Services | 2025 | 21 | $135,996 |
| Township of Val Rita-Harty | Municipalities & Services | 2024 | 1 | $104,552 |
| Township of Wainfleet | Municipalities & Services | 2025 | 9 | $128,298 |
| Township of Warwick | Municipalities & Services | 2025 | 4 | $117,133 |
| Township of Wellesley | Municipalities & Services | 2025 | 11 | $128,245 |
| Township of Wellington North | Municipalities & Services | 2025 | 10 | $125,410 |
| Township of West Lincoln | Municipalities & Services | 2025 | 20 | $133,902 |
| Township of White River | Municipalities & Services | 2023 | 1 | $109,533 |
| Township of Whitewater Region | Municipalities & Services | 2025 | 5 | $120,592 |
| Township of Wilmot | Municipalities & Services | 2025 | 19 | $128,327 |
| Township of Wollaston | Municipalities & Services | 2025 | 2 | $104,213 |
| Township of Woolwich | Municipalities & Services | 2025 | 26 | $123,684 |
| Township of Zorra | Municipalities & Services | 2025 | 9 | $126,835 |
| Trafalgar Memorial Hosp.-Oakville | Hospitals & Boards of Public Health | 1997 | 1 | $140,000 |
| Training, Colleges & Universities | Government of Ontario – Ministries | 2019 | 212 | $119,480 |
| Trans Canada Trail | Other Public Sector Employers | 2014 | 3 | $197,307 |
| Transcare Community Support Services | Other Public Sector Employers | 2025 | 2 | $132,222 |
| Transform Shared Service Organization | Other Public Sector Employers | 2023 | 33 | $122,460 |
| Transitional Council for the College of Homeopaths | Other Public Sector Employers | 2014 | 1 | $116,600 |
| Transitional Council of the College of Homeopaths of Ontario | Other Public Sector Employers | 2013 | 1 | $116,600 |
| Transitional Council of the College of Naturopaths of Ontario | Other Public Sector Employers | 2014 | 1 | $115,001 |
| Transitional Council of the College of Registered Psychotherapists & Registered Mental Health Therapists of Ontario | Other Public Sector Employers | 2015 | 3 | $115,092 |
| Transitions for Youth | Other Public Sector Employers | 2008 | 1 | $101,286 |
| Transportation | Government of Ontario – Ministries | 2025 | 1,710 | $135,202 |
| Transportation Association of Canada | Other Public Sector Employers | 1996 | 1 | $108,400 |
| Travel Industry Council of Ontario | Other Public Sector Employers | 2022 | 8 | $174,230 |
| Traverse Independence | Other Public Sector Employers | 2012 | 1 | $104,152 |
| Traverse Independence Not for Profit | Other Public Sector Employers | 2025 | 1 | $130,212 |
| Treasury Board Secretariat | Government of Ontario – Ministries | 2025 | 1,198 | $136,882 |
| Treaty Three Police Service | Municipalities & Services | 2004 | 1 | $100,228 |
| Treaty Three Police Services Board Inc | Other Public Sector Employers | 2025 | 47 | $160,818 |
| Treaty Three Police Services Inc. | Other Public Sector Employers | 2015 | 3 | $112,653 |
| Treaty Three Policy Services Inc. | Other Public Sector Employers | 2011 | 3 | $114,317 |
| Trees Ontario | Other Public Sector Employers | 2012 | 1 | $147,000 |
| Trees Ontario Foundation | Other Public Sector Employers | 2014 | 1 | $147,000 |
| Trellis Mental Health & Developmental Services | Other Public Sector Employers | 2011 | 1 | $164,911 |
| Trellis Mental Health & Developmental Services / Santé de treillis mentale et des Services de développement | Other Public Sector Employers | 2012 | 2 | $127,005 |
| Trent Hills Family Health Team | Other Public Sector Employers | 2023 | 4 | $115,726 |
| Trent University | Universities | 2025 | 454 | $155,289 |
| Trenton Memorial Hospital | Hospitals & Boards of Public Health | 1997 | 2 | $141,823 |
| Tri-County Community Support Services | Other Public Sector Employers | 2020 | 1 | $106,960 |
| Tri-County Mennonite Homes | Other Public Sector Employers | 2025 | 14 | $128,688 |
| Tribunals Ontario | Crown Agencies | 2025 | 291 | $139,324 |
| TriCounty Addictions Program | Other Public Sector Employers | 2014 | 1 | $107,440 |
| TRIEC (Toronto Region Immigrant Employment Council) | Other Public Sector Employers | 2025 | 2 | $144,722 |
| Trillium Gift of Life Network | Crown Agencies | 2020 | 36 | $122,246 |
| Trillium Health Centre | Hospitals & Boards of Public Health | 2010 | 121 | $139,893 |
| Trillium Health Partners | Hospitals & Boards of Public Health | 2025 | 3,290 | $124,829 |
| Trillium Lakelands District School Board | School Boards | 2025 | 805 | $120,817 |
| Trillium Network for Advanced Manufacturing | Other Public Sector Employers | 2024 | 1 | $144,441 |
| Trinity College | Universities | 2025 | 40 | $143,729 |
| Trinity Village Care Centre | Other Public Sector Employers | 2010 | 1 | $116,811 |
| TRIO | Other Public Sector Employers | 1996 | 1 | $114,100 |
| Tri–County Mennonite Homes | Other Public Sector Employers | 2012 | 2 | $110,999 |
| Tropicana Community Services | Other Public Sector Employers | 2015 | 1 | $100,154 |
| Tropicana Community Services Organization | Other Public Sector Employers | 2025 | 2 | $105,644 |
| True Patriot Love Foundation | Other Public Sector Employers | 2024 | 6 | $171,670 |
| Tungasuvvingat Inuit | Other Public Sector Employers | 2025 | 6 | $118,870 |
| Turning Point Inc | Other Public Sector Employers | 2022 | 1 | $101,367 |
| Turning Point Youth Services | Other Public Sector Employers | 2025 | 2 | $138,316 |
| Tweed & District Community Health Centre & Senior Serv. | Other Public Sector Employers | 1996 | 1 | $135,753 |
| Tweed and District CHC | Other Public Sector Employers | 1998 | 2 | $140,642 |
| Twin Bridges Nurse Pracititioner Led Clinic | Other Public Sector Employers | 2023 | 6 | $137,994 |
| Twin Bridges Nurse Practitioner-Led Clinic | Other Public Sector Employers | 2016 | 1 | $102,828 |
| Two Rivers Community Development Centre | Other Public Sector Employers | 2025 | 1 | $130,000 |
| Two Rivers Family Health Team | Other Public Sector Employers | 2023 | 1 | $135,375 |
| Two Rivers Family Health Team Inc. | Other Public Sector Employers | 2012 | 1 | $104,551 |
| Twoplugs Inc | Other Public Sector Employers | 2024 | 1 | $120,000 |