This is a list of the 50 largest islands in the North Sea.
| Island | Country | Location/Land | Area (km2) | |
| 1. | 969 | |||
| 2. | 523 | |||
| 3. | 241 | |||
| 4. | Shetland | 212 | ||
| 5. | Vestland | 198 | ||
| 6. | Vestland | 177 | ||
| 7. | Vestland | 176 | ||
| 8. | Vestland | 171 | ||
| 9. | 162 | |||
| 10. | Skærbæk municipality | 128 | ||
| 11. | Shetland | 121 | ||
| 12. | Vestland | 103 | ||
| 13. | Vestland | 99 | ||
| 14. | Schleswig-Holstein | 99 | ||
| 15. | 94 | |||
| 16. | 88 | |||
| 17. | Vestland | 88 | ||
| 18. | Schleswig-Holstein | 82 | ||
| 19. | North Frisian Islands | 80 | ||
| 20. | Friesland | 60 | ||
| 21. | 58 | |||
| 22. | Vestland | 50 | ||
| 23. | 46.5 | |||
| 24. | 46.5 | |||
| 25. | Rogaland | 46.5 | ||
| 26. | Friesland | 41 | ||
| 27. | Friesland | 40 | ||
| 28. | Vestland | 38 | ||
| 29. | Schleswig-Holstein | 37 | ||
| 30. | Vestland | 37 | ||
| 31. | Rogaland | 36 | ||
| 32. | 35.41 | |||
| 33. | Vestland | 34 | ||
| 34. | Vestland | 32 | ||
| 35. | Niedersachsen | 31 | ||
| 36. | 29.6 | |||
| 37. | 28.6 | |||
| 38. | Vestland | 26.3 | ||
| 39. | Germany | Niedersachsen | 26 | |
| 40. | Rogaland | 25 | ||
| 41. | Vestfold | 24.5 | ||
| 42. | Vestland | 23.8 | ||
| 43. | Thames Estuary | 23.8 | ||
| 44. | Østfold | 23.6 | ||
| 45. | Schleswig-Holstein | 20.46 | ||
| 46. | Agder | 20 | ||
| 47. | Rogaland | 19.9 | ||
| 48. | 19.7 | |||
| 49. | Shetland Islands | 19.7 | ||
| 50. | Østfold | 19 | ||