History Prior to the Establishment of the English Monarchy
Monarchs of East Anglia (571 - 918)
Monarchs of Essex (527 - 825)
Monarchs of Kent (450 - 825)
Monarchs of Mercia (585 - 919)
Monarchs of Northumbria (500 - 1041)
Monarchs of Sussex
Monarchs of Wessex (519 - 924)
Monarchs of England
The Saxons 
Ælfred the Great 878-899 Æthelwulf's son and King of Wessex. He died, aged about 50, of natural causes
Edward the Elder 899-924 Ælfred's son. Died, aged about 50, of natural causes.
Ethelweard 924 Edward's son. Reason for death unknown, but he died 16 days after Edward the Elder, aged about 21.
Athelstan 924-939 Edward's son. Died of natural causes, aged about 46.
Edmund I 939-946 Edward's son. murdered by Leofa, an exiled thief, aged about 25.
Edred 946-955 Edward's son. Died, aged about 31, from a digestive malady.
Edwig 955-959 Edmund's son. Died, aged about 18. Reason for death unknown.
Edgar the Peaceful 959-975 Edmund's son. Died, aged 31. Reason for death unknown.
St Edward the Martyr 975-978 Edgar's son. Murdered, aged about 15.
Ethelred II (the unready) 978-1013 Edgar's son. Fled to Normandy.
The Danelaw
For a period of time, both the Saxons and the Danish claimed the English throne. 
Sweyn Forkbeard 1013-1014 King Harald Bluetooth of Denmark's son. Died, aged about 31. Reason for death unknown.
Ethelred II (the unready) 1014-1016 Edgar's son. Died, aged about 48. Reason for death unknown.
Edmund II 1016 Ethelred II's son. Shared the reign with Canute. Edmund taking Wessex. Died, aged about 25. Reason for death unknown.
Canute the Great 1016-1035 Sveyn's son. Died, aged about 40. Reason for death unknown.
Harold I (Harefoot) 1035-1040 Canute's illegitimate son. Died, aged about 24, of a mysterious illness.
Harthacanute 1040-1042 Canute's son. He was the ligitimate heir of Canute, but could not travel to England, due to problems defending Denmark. Died of a heart attack, aged 23.
The Saxon Restoration 
St Edward the Confessor 1042-1066 Ethelred II's son. Died, aged about 62. Reason for death unknown.
Harold II (Godwinson) 1066 Edward the Confessor's brother-in-law. Killed at the Battle of Hastings, aged 43.
The Normans
After the Norman Conquest in 1066, numbering of kings (a French tradition applied to the Saxons only by historians) begins anew, although this affects only the Edwards. 
William I (The Conqueror) 1066-1087 son of the unmarried Robert I, Duke of Normandy, by Robert's mistress Herleva. He either fell ill or was injured by the pommel of his saddle and died, aged about 59.
William II (the Red) 1087-1100 William I's son. Died, aged about 43, in a hunting accident.
Henry I 1100-1135 William I's son. Died, aged 67, after falling ill, after eating a number of lampreys against his physician's advice.
Stephen 1135-1154 William I's grandson. Matilda disputed Stphen's rule, but was never crowned in 1141. Died, aged about 58, of a stomach disorder.
The Angevins or Plantagenets
The Royal House name changed to reflect Matilda's marriage to Geoffrey Plantagenet. 
Henry II 1154-1189 Matilda's son. Henry I's grandson. Died, aged 56, of a bleeding ulcer.
Richard I (the Lionheart) 1189-1199 Henry II's son. Died, aged 41, from gangrene from a crossbow wound. The crossbow had been fired by a boy, who claimed he killed his father.
John 1199-1216 Henry II's son. Died, aged 49, of dysentry.
Henry III 1216-1272 John's son, Died, aged 65, of unknown illness.
Edward I (Longshanks) 1272-1307 Henry III's son. Died, aged 68, of dysentry.
Edward II 1307-1327 Edward I's son abdicated and later died in the same year, 1327, under suspicious curcumstances. He was 43.
Edward III 1327-1377 Edward II's son. Died, aged 64, of a stroke.
Richard II 1377-1399 Edward III's grandson, son of Edward the Black Prince, who had died. Richard abdicated and died, aged 33 of starvation.
The House of Lancaster
Henry Bolingbroke deposed Richard II, and the Royal House name came to reflect Henry's father's title, Duke of Lancaster. 
Henry IV 1399-1413 Edward III's grandson. Died, aged 45, of unknown cardovascular problem.
Henry V 1413-1422 Henry IV's son. Died, aged 35, apparently of dysentry.
Henry VI 1422-1461 Henry V's son was deposed by Edward IV, in the War of the Roses.
The House of York
The Houses of Lancaster and York had fought the War of the Roses, and the Yorkists took the throne. 
Edward IV 1461-1470 Edward III's great-great-grandson was deposed temporarily by the Earl of Warwick.
The House of Lancaster
Henry was briefly restored to the throne, in an event known as the redemption of Henry VI. 
Henry VI 1470-1471 Henry V's son was briefly restored to the throne, but then reimprisioned in the tower, where he was murdered, aged 49.
The House of York
The Houses of Lancaster and York had fought the War of the Tewkesbury, and the Yorkists took back the throne. 
Edward IV 1471-1483 Edward III's great-great-grandson. Died, aged 40, of pneumonia or typhoid.
Edward V 1483 Edward IV's son. His father's marriage was ruled invalid and there fore his reign was invalid. He was imprisoned in the tower with his brother. He was murdered aged 13.
Richard III 1483-1485 Edward IV's brother. Died at the Battle of Bosworth Field, aged 32.
The House of Tudor
The Lancastrian Henry Tudor reclaimed the throne from the Yorkists. 
Henry VII 1485-1509 Edward III's great-great-grandson. Died, aged 52, of tuberculosis.
Henry VIII 1509-1547 Henry VII's son. Died, aged 55, of obesity related illness.
Edward VI 1547-1553 Henry VIII's son. Died, aged 15, of a suppurating tumour.
Lady Jane Grey 1553 Henry VII's great-granddaughter. Died, aged 16, by execution (beheading).
Mary I (Bloody Mary) 1553-1558 Henry VIII's daughter. Died, aged 42, of influenza.
Elizabeth I (the Virgin Queen) 1558-1603 Henry VIII's daughter. Died, aged 69, of unknown illness.
James I 1603-1625 Henry VII of England's great-great-grandson. Died, aged 58, or dysentry.
Monarchs of England and Scotland
In 1603, James VI of Scotland inherited the English throne upon the death of Elizabeth I. From then until 1707, England and Scotland have shared monarchs. 
Charles I 1625-1649 James I's son. Died, aged 48, by execution (beheading).
The Commonwealth and Protectorate
There was no King between Charles I's execution in 1649 and the Restoration in 1660. The nation's rulers were known as Lords Protector. 
Oliver Cromwell 1653-1658 1st Lond Protectorate. Died, aged 59, or septiceamia.
Richard Cromwell 1658-1659 Oliver Cromwell's son resigned, to end the protectorate. Died, aged 85. Reason for death unknown.
Monarchs of England and of Scotland
In 1659, Richard Cromwell abdicated. Anarchy existed until the Stuart Restoration in 1660. 
Charles II 1660-1685 Charles I's son. Died, aged 54, of uraemia.
James II 1685-1689 Charles I's son was deposed by the William, Prince of Orange. Charles died, aged 69, of a brain haemorrhage.
Mary II & William III 1689-1694 James II's daughter. Died, aged 32, of smallpox.
William III 1694-1702 Mary II's husband. Died, aged 51, of pneumonia.
Anne 1702-1707 James II's daughter. Died, aged 49. Reason for death unknown.
Monarchs of Great Britain
In 1707, the Act of Union combined the Kingdom of England and the Kingdom of Scotland into the Kingdom of Great Britain. 
Anne 1707-1714 James II's daughter. Died, aged 49. Reason for death unknown.
The House of Hanover
Under the Act of Settlement, descendants of Sophia, Electress of Hanover, as the closest Protestant relatives of Anne, became entitled to the throne, and the Royal House name was changed when George, Elector of Hanover became King. 
George I 1714-1727 James I's great-grandson. Died, aged 67, of a stroke.
George II 1727-1760 George I's son. Died, aged 76, of an incipient aortic aneurysm.
George III 1760-1801 George II's son. Died, aged 81, of old age.
Monarchs of the United Kingdom of Great Britain and Ireland
In 1801, the Act of Union combined the Kingdom of Great Britain and the Kingdom of Ireland into the United Kingdom. 
George III 1801-1820 George II's son. Died, aged 81, of old age.
George IV 1820-1830 George III's son. Died, aged 67, of upper gastrointestinal bleeding.
William IV 1830-1837 George IV's son. Died, aged 71. Reason for death unknown.
Victoria 1837-1901 George III's granddaughter. Died, aged 81, of old age.
The House of Saxe-Coburg-Gotha
The Royal House name was changed to reflect Victoria's marriage to Prince Albert of Saxe-Coburg-Gotha. 
Edward VII 1901-1910 Victoria's son. Died, aged 68, after several heart attacks.
George V 1910-1917 Edward VII's son. Died, aged 70, after being injected with a lethal combination of morphine and cocaine, to preserve the King's dignity.
The House of Windsor
The name of the Royal House changed from Saxe-Coburg-Gotha to Windsor due to anti-German sentiments during World War I in 1917.
George V 1917-1927 Edward VII's son. Died, aged 70, after being injected with a lethal combination of morphine and cocaine, to preserve the King's dignity.
Monarchs of the United Kingdom of Great Britain and Northern Ireland
In 1922, the Irish Free State left the United Kingdom. The name of the Kingdom was amended in 1927 to reflect the change. 
George V 1927-1936 Edward VII's son. Died, aged 70, after being injected with a lethal combination of morphine and cocaine, to preserve the King's dignity.
Edward VIII 1936 George V's son abdicated. Died, aged 77, of throat cancer.
George VI 1936-1952 George V's son. Died, aged 56, of a coronary thrombosis.
Elizabeth II 1952-2022 George VI's daughter
Charles III 2022 - Elizabeth II's son