Publishers
- Three Imposters 1
- Threshold Books 1
- Thunder Bay Press 3
- Thurman Publishing 3
- Ticknor & Fields 1
- Tidewater Publishers 1
- Tiger Books 2
- Tiger Books International 2
- Timber Press 4
- Timberholme Books 1
- Times Books 6
- Tinder Press 1
- Tinsley Brothers 2
- Titan Books 1
- Titan Comics 1
- Titus Wilson & Son 1
- Titus Wilson & Son, Ltd. 1
- Tlc Publishing Inc. 4
- Toby Twirl Ltd. 2
- Todtri 2
- Tom Dickins Fine Art 4
- Tom Donovan 2
- Tom Purves 1
- Tomahawk Films 1
- Top Sellers Ltd. 3
- Topsy Ii Publishing 1
- Tor Mark Press 2
- Toronto Public Library 3
- Total Detail Publications Ltd 1
- Touchstone Books 1
- Tourrett Publishing 2
- Towarzystwo Akcyjne 1
- Tower Press 1
- Town & Country Press 1
- Town County Books 1
- Town House 1
- Town House & Country House 1
- Trackmaps 1
- Trade & Travel Publications 1
- Tramroad House 1
- Transatlantic Arts Ltd. 5
- Transport Bookman Publications 7
- Transport Publishing Co. Ltd. 1
- Transport Treasury Publishing Ltd 2
- Transpress 1
- Transworld Publishers Ltd. 1
- Traplet Publications 1
- Travel Publishing 1
- Treasure Library 1
- Tredegar Historical Society 1
- Trefoil Books 1
- Trefoil Publications 1
- Trent Valley Publications 1
- Treowen Press 1
- Trevor A. Bevis 1
- Trevor Bevis 1
- Triangle Publishing 1
- Tribune 1
- Trident Press 1
- Trimik Publishing 1
- Trinity University Press 1
- Trois Conils 1
- Trollius Publications 1
- Trondheim 1
- Trubner & Co. 1
- True North 3
- Tucann 1
- Tuckwell Press 1
- Tudor Journals 1
- Tudor Printing Works 1
- Tuna Roll Publications Ltd 1
- Tunbridge Wells High School 1
- Turbo Machinery 1
- Turner Publishing, Inc. 1
- Turntable Publications 3
- Turret Books 1
- Turton & Armstrong 1
- Turton & Chambers 1
- Tuttle Publishing 1
- Tweenbrook Publishing 1
- Twin Pines Press 1
- Two Crows Books 1
- Two Hoots 3
- Two Lions 1
- Tyndall 1
- Tyne And Wear Museums 1
- Tyne Bridge Publishing 1
- Tynron Press 1