T
- Teakdecking Systems
- Teknor Apex
- Dometic (Teleflex Morse / Seastar Solutions)
- Tempress
- Tender Corporation
- Tera Pump
- Terramar Sports Inc
- Tessilmare
- The Bosworth Co.
- Thetford
- Thin-Lite
- Thomas Machine & Foundry
- Tica Fishing Tackle
- Tidewater Power
- Tie Down Engineering
- Tiflex Limited
- Todd USA Boat Seats
- Toon-brite
- Trac Ecological
- Trac Outdoor
- Travis Pattern and Foundry
- Trident Marine
- Trilogy Crab Pots
- Trilogy Marine Manufacturing
- Trimax Locks
- TSX Products
- Tufropes
- Trimaco
- Toadfish