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- Tegernsee: Walchensee class (Type 703) small coastal tanker
- Thetis: 2,700 ton Gazelle class light cruiser
- Thetis: Norwegian Tordenskjold class coastal defence ship Harald Haarfagre captured in April 1940, re-designated as Flak ship.
- Theodor Riedel: 2,230 ton Type 1934A destroyer
- Thor HSK 4: 10,000 ton unique auxiliary merchant cruiser
- Thielbek: 2,800 ton Converted from freighter to transport ship, sunk 1945
- Thüringen: 23,000 ton Helgoland class battleship, launched 1909
- Tiger: Iltis class gunboat, launched 15 August 1899, commissioned 3 April 1900, scuttled 29 October 1914
- Tiger, Norwegian Sleipner class destroyer Tor captured in April 1940, re-designated as torpedo boat.
- Tiger: Jaguar class (Type 140) fast attack craft, commissioned 1958 to 1974
- Tiger: Tiger class (Type 148) fast attack craft, decommissioned
- Tirpitz: 42,000 ton Bismarck class battleship, launched 1939
- Togo, Norwegian minesweeper Otra captured in April 1940, re-designated as Vorpostenboot, later to minelayer.
- Trave: Isles class (Type 139 patrol trawler)
- Tübingen: Lindau class (Type 320) minesweeper, commissioned 1958 to 1975, upgraded to Type 331
- Tübingen: Fulda class (Type 331, upgraded Type 320 Lindau class) minesweepers, commissioned 1978 to 1997
- Tümmler: Barbe class (Type 520) utility landing craft, used as transport ships (decommissioned)
Read more about this topic: List Of Naval Ships Of Germany