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Allied Warships
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The Most Successful U-boats
This is a simple table showing the most successful U-boats of WWII. Warships are not included in those figures.
| U-boat | Patrols | Successes | |
| 1. | U-48 | 12 patrols | 51 ships sunk (306.875 tons) 3 ships damaged (20.480 tons) |
| 2. | U-103 | 11 patrols | 45 ships sunk (237.596 tons) 3 ships damaged (28.158 tons) |
| 3. | U-123 | 12 patrols | 42 ships sunk (219.924 tons) 6 ships damaged (53.568 tons) |
| 4. | U-124 | 11 patrols | 46 ships sunk (219.178 tons) 4 ships damaged (30.067 tons) |
| 5. | U-107 | 14 patrols | 37 ships sunk (207.375 tons) 4 ships damaged (25.638 tons) |
| 6. | U-37 | 11 patrols | 53 ships sunk (200.124 tons) 1 ship damaged (9.494 tons) |
| 7. | U-66 | 9 patrols | 33 ships sunk (200.021 tons) 4 ships damaged (22.738 tons) |
| 8. | U-99 | 8 patrols | 35 ships sunk (198.218 tons) 6 ships damaged (40.101 tons) |
| 9. | U-68 | 10 patrols | 32 ships sunk (197.453 tons) |
| 10. | U-38 | 11 patrols | 35 ships sunk (188.967 tons) 1 ship damaged (3.670 tons) |
| 11. | U-96 | 11 patrols | 27 ships sunk (181.206 tons) 5 ships damaged (41.931 tons) |
| 12. | U-552 | 15 patrols | 30 ships sunk (163.756 tons) 3 ships damaged (26.910 tons) |
| 13. | U-47 | 10 patrols | 30 ships sunk (162.769 tons) 8 ships damaged (62.751 tons) |
| 14. | U-160 | 5 patrols | 26 ships sunk (156.082 tons) 5 ships damaged (34.419 tons) |
| 15. | U-172 | 6 patrols | 26 ships sunk (152.080 tons) |
| 16. | U-129 | 10 patrols | 29 ships sunk (143.748 tons) |
| 17. | U-94 | 10 patrols | 26 ships sunk (141.852 tons) 1 ship damaged (8.022 tons) |
| 18. | U-181 | 4 patrols | 27 ships sunk (138.779 tons) |
| 19. | U-106 | 10 patrols | 22 ships sunk (138.581 tons) 4 ships damaged (51.980 tons) |
| 20. | U-100 | 6 patrols | 25 ships sunk (135.614 tons) 5 ships damaged (19.434 tons) |