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- Tay Public Library
- Teck Centennial Public Library
- Temagami Public Library
- Temiskaming Shores Public Library
- Terrace Bay Public Library
- Thorold Public Library
- Thunder Bay Public Library
- Tillsonburg Public Library
- Timmins Public Library
- Toronto Public Library
- Trent Hills Public Library
- Tudor & Cashel Township Public Library
- Tweed Public Library
- Tyendinaga Township Public Library
Read more about this topic: List Of Public Libraries In Ontario