| Navy | The US Navy |
| Type | Submarine |
| Class | Balao |
| Pennant | 412 |
| Built by | Mare Island Navy Yard (Vallejo, California, U.S.A.) |
| Ordered | 8 Jun 1942 |
| Laid down | 25 Jun 1943 |
| Launched | 23 Mar 1944 |
| Commissioned | 22 May 1944 |
| End service | 30 Jun 1967 |
| Loss position | |
| History | Decommissioned 27 June 1946. Laid up in the Pacific Reserve Fleet. Stricken 30 June 1967. Sunk as a target on 16 September 1969 by USS Henderson (DD 785) and USS Fechteler (DD 870). |
Commands listed for USS Trepang (412)
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| Commander | From | To | |
| 1 | Cdr. Roy Milton Davenport, USN | 22 May 1944 | Dec 1944 |
| 2 | Cdr. Allen Russell Faust, USN | Jan 1945 | Jul 45 ? |
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Noteable events involving Trepang include:
13 Sep 1944
USS Trepang (Cdr. Roy Milton Davenport) departs Pearl Harbour for her 1st war patrol. She is ordered to patrol south of Honshu, Japan.
1 Oct 1944
USS Trepang (Cdr. R.M. Davenport) torpedoes and sinks the Japanese supply ship Takunan Maru (752 GRT) north of Ogasawara-Gunto in position 25º30'N, 142º30'E. (see map)
11 Oct 1944
USS Trepang (Cdr. R.M. Davenport) torpedoes and sinks the Japanese landing ship T 105 (870 tons) off Honshu, Japan in position 33º18'N, 137º42'E. (see map)
12 Oct 1944
USS Trepang (Cdr. R.M. Davenport) torpedoes and damages the Japanese destroyer Fuyuzuki (2701 tons, offsite link) off Omaesuki, Japan in position 33º56'N, 138º09'E. (see map)
23 Oct 1944
USS Trepang (Cdr. R.M. Davenport) ends her 1st war patrol at Majuro.
16 Nov 1944
USS Trepang (Cdr. R.M. Davenport) departs Majuro for her 2nd war patrol. She is ordered to patrol in Luzon Strait.
6 Dec 1944
USS Trepang (Cdr. R.M. Davenport) torpedoes and sinks the Japanese army cargo ship Fukuyo Maru (5463 GRT) and the Japanese merchant cargo ship Jinyo Maru (6862 GRT) and torpedoes and damages the Japanese merchant cargo ship Yamakuni Maru (500 GRT) north of Luzon, Philippines in position 18º59'N, 121º05'E. (see map)
7 Dec 1944
USS Trepang (Cdr. R.M. Davenport) torpedoes and sinks the Japanese troop transport Banshu Maru No.31 (748 GRT) north of Luzon, Philippines in position 18º54'N, 120º49'E. (see map)
20 Dec 1944
USS Trepang (Cdr. R.M. Davenport) ends her 2nd war patrol at Pearl Harbour.
25 Jan 1945
USS Trepang (Cdr. Allen Russell Faust) departs Pearl Harbour for her 3rd war patrol, and is ordered to patrol of Honshu, Japan.
24 Feb 1945
USS Trepang (Cdr. A.R. Faust) torpedoes and sinks the Japanese merchant cargo ship Uzuki Maru (875 GRT) north-north-east of Mikizaki, Japan in position 32º40'N, 132º33'E. (see map)
3 Mar 1945
USS Trepang (Cdr. A.R. Faust) torpedoes and sinks the Japanese auxiliary gunboat Nissho Maru No.2 (1386 GRT) off Mijake Jima, Japan in position 34º05'N, 139º54'E. Trepang ends her 3rd war patrol at Guam. (see map)
28 Apr 1945
While on her 4th war patrol USS Trepang (Cdr. A.R. Faust) torpedoes and sinks the Japanese landing ship T 146 (870 tons) off Osezaki, Japan in position 32º24'N, 128º40'E. (see map)
30 Apr 1945
While on her 4th war patrol USS Trepang (Cdr. A.R. Faust) torpedoes and sinks the Japanese troop transport Miho Maru (4667 GRT) in the Yellow Sea in position 34º27'N, 123º48'E. (see map)
4 May 1945
While on her 4th war patrol USS Trepang (Cdr. A.R. Faust) torpedoes and sinks the Japanese minesweeper W 20 (648 tons, offite link) in the Yellow Sea about 140 nautical miles south-east of Mokpo, Korea in position 34º16'N, 123º37'E. Trepang ends her 4th war patrol at Guam. (see map)
7 Jul 1945
While on her 5th war patrol USS Trepang (Cdr. A.R. Faust) torpedoes and sinks the Japanese merchant cargo ship Koun Maru No.2 (606 GRT) east of Japan in position 42º21'N, 141º28'E. (see map)
14 Jul 1945
While on her 5th war patrol USS Trepang (Cdr. A.R. Faust) sinks a small Japanese vessel with gunfire east of Honshu, Japan in position 38º43'N, 141º53'E. Trepang ends her 5th war patrol at Pearl Harbour. (see map)