| U-555 | Type VIIC |
| Feldpost Number | M 34 971 |
| Construction Yard | Blohm und Voß, Hamburg |
| Yard Number | 531 |
| Ordered | 25th Sep 1939 |
| Keel laid | 2nd Jan 1940 |
| Launched | 7th Dec 1940 |
| Commissioned | 30th Jan 1941 |
| Baubelehrung | Baubelehrung U-Boote Nordsee, Bremen |
| Training, Flotillas and Duties |
| 01.41 - 11.42 | 24.U-Flottille, Danzig;Trondheim & Memel Ausbildungsboot (under training)
|
| 12.42 - 03.45 | 21.U-Flottille, Pillau Schulboot (training boat)
|
| Commanders |
| 30.01.41 - 25.08.41 | KL Hans-Joachim Horrer see also: U-589 |
| 26.08.41 - 04.02.42 | OL Götz von Hartmann see also: U-563 U-441 |
| 05.02.42 - 08.42 | KL Horst Rendtel see also: U-641 |
| 08.42 - 04.10.42 | LT ~ OL Franz Saar see also: U-46 U-30 U-957 |
| 05.10.42 - 30.11.43 | LT ~ OL Dieter Erdmann see also: U-904 |
| 01.12.43 - 03.45 | OL Detlef Fritz see also: U-904 |