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- Ta Tung (China): 900-ton patrol boat
- Taara (Estonia): gunboat
- Tamoio (Brazil): 844-ton submarine, ex-Ascianghi (Italy)
- Tartu (Estonia): 108-ton gunboat
- Tegualda (Chile): 435-ton submarine
- Teh Sheng (China): 932-ton gunboat, scuttled 1937
- Ternen (Denmark): 100-ton surveying tender and patrol boat
- Timbira (Brazil): 844-ton submarine, ex-Gondor (Italy)
- Tirane (Albania): 46-ton patrol boat
- Tor (Norway): 735-ton Sleipner class destroyer
- Triton (Denmark): 237-ton Ægir class submarine
- Troll (Norway): 578-ton Draug class destroyer
- Trygg (Norway): 256-ton Trygg class torpedo boat
- Tse Chiang (China): 900-ton patrol boat
- Tui (New Zealand): 607-ton Bird class minesweeper
- Tung An (China): 390-ton destroyer
- Tupi (Brazil): 844-ton submarine, ex-Neghelli (Italy)
- Tursas (Finland): 360-ton trawler
- Turunmaa (Finland): 342-ton gunboat
- Tyr (Norway): 294-ton minelayer
Read more about this topic: List Of World War II Ships Of Less Than 1000 Tons