| | Monarch | Dates | Length of Reign |
| 1. | Queen Victoria | Ascended: June 20, 1837 -
Died: January 22, 1901 | 63 years 7 months 2 days |
| 2. | King George III | Ascended: October 25, 1760 -
Died: January 29, 1820 | 59 years 3 months 2 days |
| 3. | Queen Elizabeth II | Ascended: February 6, 1952 -
Today: 09 May 2008 | 56 years 3 months 1 days |
| 4. | King Henry III | Ascended: October 18, 1216 -
Died: November 16, 1272 | 56 years 29 days |
| 5. | King Edward III | Ascended: January 25, 1327 -
Died: June 21, 1377 | 50 years 4 months 25 days |
| 6. | Queen Elizabeth I | Ascended: November 17, 1558 -
Died: March 24, 1603 | 44 years 4 months 5 days |
| 7. | King Henry VI | Ascended: September 1, 1422 -
Deposed March 4, 1461, Restored Oct 3, 1470, Died: May 21, 1471 | 39 years 1 months 18 days |
| 8. | King Aethelred II The Unready | Ascended: March 18, 978 -
Died: April 23, 1016 | 38 years 1 months 5 days |
| 9. | King Henry VIII | Ascended: April 21, 1509 -
Died: January 28, 1547 | 37 years 9 months 7 days |
| 10. | King Henry I | Ascended: August 3, 1100 -
Died: December 2, 1135 | 35 years 3 months 28 days |
| 11. | King Henry II | Ascended: October 25, 1154 -
Died: July 6, 1189 | 34 years 8 months 11 days |
| 12. | King Edward I Longshanks | Ascended: November 20, 1272 -
Died: July 7, 1307 | 34 years 7 months 14 days |
| 13. | King George II | Ascended: June 11, 1727 -
Died: October 25, 1760,
Note: Adjusted for change from Julian to Gregorian calendar 1751/1752 | 33 years 1 months 14 days |
| 14. | King George V | Ascended: May 6, 1910 -
Died: January 20, 1936 | 25 years 8 months 15 days |
| 15. | King Charles II | Ascended: May 29, 1660 -
Died: February 6, 1685 | 24 years 8 months 9 days |
| 16. | King Charles I | Ascended: March 27, 1625 -
Died: January 30, 1649 | 23 years 10 months 4 days |
| 17. | King Henry VII | Ascended: August 22, 1485 -
Died: April 21, 1509 | 23 years 7 months 28 days |
| 18. | King Edward The Confessor | Ascended: June 8, 1042 -
Died: January 5, 1066 | 23 years 6 months 28 days |
| 19. | King Richard II | Ascended: June 22, 1377 -
Died: February 14, 1400 | 22 years 7 months 23 days |
| 20. | King James I | Ascended: March 24, 1603 -
Died: March 27, 1625,
King of Scotland 57 years 1567-1625 | 22 years 3 days |
| 21. | King Edward IV | Ascended: March 4, 1461 -
Deposed October 3, 1470, Restored May 21, 1471, Died: April 9, 1483 | 21 years 5 months 18 days |
| 22. | King William I The Conqueror | Ascended: December 25, 1066 -
Died: September 9, 1087 | 20 years 8 months 14 days |
| 23. | King Edward II | Ascended: July 8, 1307 -
Died: September 21, 1327 | 20 years 2 months 14 days |
| 24. | King Cnut (Canute) | Ascended: November 30, 1016 -
Died: November 12, 1035 | 18 years 11 months 11 days |
| 25. | King Stephen | Ascended: December 22, 1135 -
Died: October 25, 1154 | 18 years 10 months 3 days |
| 26. | King John | Ascended: April 6, 1199 -
Died: October 18, 1216 | 17 years 6 months 13 days |
| 27. | King Athelstan | Ascended: July 17, 924 -
Died: October 27, 940 | 16 years 3 months 10 days |
| 28. | King Edgar | Ascended: October 1, 959 -
Died: July 8, 975 | 15 years 9 months 6 days |
| 29. | King George VI | Ascended: Dec 11, 1936 -
Died: February 6, 1952 | 15 years 1 months 25 days |
| 30. | King Henry IV | Ascended: September 30, 1399 -
Died: March 20, 1413 | 13 years 5 months 18 days |
| 31. | King William III and Queen Mary II | Ascended: February 13, 1689 -
Died: March 8, 1702 | 13 years 21 days |
| 32. | King William II Rufus | Ascended: September 9, 1087 -
Died: August 2, 1100 | 12 years 10 months 22 days |
| 33. | King George I | Ascended: August 1, 1714 -
Died: June 11, 1727 | 12 years 10 months 9 days |
| 34. | Queen Anne | Ascended: March 8, 1702 -
Died: August 1, 1714 | 12 years 4 months 24 days |
| 35. | King George IV | Ascended: January 29, 1820 -
Died: June 26, 1830 | 10 years 4 months 26 days |
| 36. | King Richard I The Lion Heart | Ascended: July 6, 1189 -
Died: April 6, 1199 | 9 years 8 months 30 days |
| 37. | King Edred | Ascended: May 26, 946 -
Died: November 23, 955 | 9 years 5 months 28 days |
| 38. | King Henry V | Ascended: March 20, 1413 -
Died: August 31, 1422 | 9 years 5 months 11 days |
| 39. | King Edward VII | Ascended: January 22, 1901 -
Died: May 6, 1910 | 9 years 3 months 12 days |
| 40. | King William IV | Ascended: June 26, 1830 -
Died: June 20, 1837 | 6 years 11 months 24 days |
| 41. | King Edward VI | Ascended: January 28, 1547 -
Died: July 6, 1553 | 6 years 5 months 7 days |
| 42. | King Edmund | Ascended: October 27, 940 -
Died: May 26, 946 | 5 years 6 months 28 days |
| 43. | Queen Mary I | Ascended: July 19, 1553 -
Died: November 17, 1558 | 5 years 3 months 29 days |
| 44. | King Harold I Harefoot | Ascended: November 12, 1035 -
Died: March 17, 1040 | 4 years 4 months 4 days |
| 45. | King Edwy (Eadwig) | Ascended: November 23, 955 -
Died: October 1, 959 | 3 years 10 months 7 days |
| 46. | King James II | Ascended: February 6, 1685 -
Abdicated: December 11, 1688 | 3 years 10 months 3 days |
| 47. | King Edward The Martyr | Ascended: July 8, 975 -
Died: March 18, 978 | 2 years 8 months 10 days |
| 48. | King Harthacnut | Ascended: March 17, 1040 -
Died: June 8, 1042 | 2 years 2 months 21 days |
| 49. | King Richard III | Ascended: June 26, 1483 -
Died: August 22, 1485 | 2 years 1 months 27 days |
| 50. | King Edward VIII | Ascended: Jan 20, 1936 -
Abdicated: December 11, 1936 | 10 months 21 days |
| 51. | King Harold II | Ascended: January 5, 1066 -
Died: October 14, 1066 | 9 months 8 days |
| 52. | King Edmund II lronside | Ascended: April 23, 1016 -
Died: November 30, 1016 | 7 months 7 days |
