U-boat Successes
This table showing the most successful U-boats of WWII. Warships are not included in those figures.
| U-boat | Patrols | Successes | |
| 1. | U-48 | 13 patrols | 51 ships sunk (306.874 tons) 3 ships damaged (20,480 tons) |
| 2. | U-103 | 12 patrols | 46 ships sunk (238.944 tons) 3 ships damaged (28,158 tons) |
| 3. | U-123 | 12 patrols | 43 ships sunk (220.158 tons) 6 ships damaged (53,568 tons) |
| 4. | U-124 | 11 patrols | 46 ships sunk (219.862 tons) 4 ships damaged (30,067 tons) |
| 5. | U-107 | 13 patrols | 37 ships sunk (207.375 tons) 4 ships damaged (25,638 tons) |
| 6. | U-37 | 11 patrols | 53 ships sunk (200.063 tons) 1 ship damaged (9,494 tons) |
| 7. | U-66 | 10 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 | 11 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-515 | 7 patrols | 22 ships sunk (140.196 tons) 4 ships damaged (13,972 tons) |
| 19. | U-181 | 4 patrols | 27 ships sunk (138.779 tons) |
| 20. | U-106 | 10 patrols | 22 ships sunk (138.581 tons) 4 ships damaged (51,980 tons) |
| 21. | U-100 | 6 patrols | 25 ships sunk (135.614 tons) 5 ships damaged (19,434 tons) |
| 22. | U-130 | 6 patrols | 21 ships sunk (127.608 tons) 1 ship damaged (6,986 tons) |
| 23. | U-155 | 10 patrols | 25 ships sunk (126.664 tons) 1 ship damaged (6,736 tons) |
| 24. | U-105 | 9 patrols | 22 ships sunk (123.924 tons) |
| 25. | U-159 | 5 patrols | 23 ships sunk (119.554 tons) 1 ship damaged (265 tons) |
| 26. | U-108 | 11 patrols | 25 ships sunk (118.722 tons) |
| 27. | U-43 | 14 patrols | 21 ships sunk (117.036 tons) 2 ships damaged (19,481 tons) |
| 28. | U-32 | 9 patrols | 20 ships sunk (116.836 tons) 5 ships damaged (40,274 tons) |
| 29. | U-101 | 10 patrols | 22 ships sunk (111.673 tons) 2 ships damaged (9,113 tons) |
| 30. | U-126 | 6 patrols | 24 ships sunk (111.564 tons) 7 ships damaged (51,674 tons) |