| U-5 | Type IIA |
| Feldpost Number | M 27 527 |
| Construction Yard | Deutsche Werke AG, Kiel-Gaarden |
| Yard Number | 240 |
| Ordered | 2nd Feb 1935 |
| Keel laid | 11th Feb 1935 |
| Launched | 14th Aug 1935 |
| Commissioned | 31st Aug 1935 |
| Baubelehrung | Marinelehr-und Reparaturwerkstatt, Kiel |
| Training, Flotillas and Duties |
| 08.35 - 06.40 | U-Schule Flottille, Neustadt Schulboot (training boat) Frontboot (operational)
|
| 07.40 - 03.43 | 21.U-Flottille, Pillau Schulboot (training boat)
|
| Commanders |
| 31.08.35 - 27.09.36 | OL Rolf Dau see also: U-31 U-42 |
| 01.10.36 - 02.02.38 | KL Gerhard Glattes see also: U-39 |
| 03.02.38 - 04.12.39 | OL Günter Kutschmann see also: U-54 |
| 05.12.39 - 11.08.40 | KL Heinrich Lehmann-Willenbrock see also: U-8 U-96 U-256 |
| 12.08.40 - 27.03.41 | OL Herbert Opitz see also: U-206 |
| 28.03.41 - 06.01.42 | OL Friedrich-Wilhelm Bothe see also: U-101 U-447 |
| 07.01.42 - 23.03.42 | OL Karl Friedrich see also: U-74 |
| 26.03.42 - 05.42 | OL Hans-Dieter Mohs see also: U-60 U-956 |
| 05.42 - 09.11.42 | OL Kurt Pressel see also: U-60 U-951 |
| 10.11.42 - 03.43 | LT Hermann Rahn |
| 03.43 - 03.43 | LT Alfred Radermacher see also: U-120 U-393 |
| 03.43 - 19.03.43 | LT Hermann Rahn |
| 03.43 - 03.43 | LT Alfred Radermacher see also: U-120 U-393 |