William IV
William IV of the United Kingdom
King of the United Kingdom
Reign 26 June 1830 – 20 June 1837
Coronation 8 September 1831
Predecessor George IV
Successor Victoria
Born 21 August 1765(1765-08-21)
Buckingham House, London
Died 20 June 1837 (aged 71)
Windsor Castle, Berkshire
Burial 8 July 1837
St George's Chapel, Windsor
Spouse Adelaide of Saxe-Meiningen
Princess Charlotte of Clarence
Princess Elizabeth of Clarence
George FitzClarence, Earl of Munster
Henry FitzClarence
Sophia Sidney, Baroness De L'Isle and Dudley
Lady Mary Fox
Lord Frederick FitzClarence
Elizabeth Hay, Countess of Erroll
Lord Adolphus FitzClarence
Lady Augusta Gordon
Lord Augustus FitzClarence
Amelia Cary, Viscountess Falkland
Full name William Henry
Royal House Hanover
Father George III
Mother Charlotte of Mecklenburg-Strelitz

|}} William IV (William Henry; 21 August 1765 – 20 June 1837) was King of the United Kingdom of Great Britain and Ireland and King of Hanover from 26 June 1830 until his death. The third son of George III and younger brother and successor to George IV, he was the last king and penultimate monarch of Britain's House of Hanover.

William served in the Royal Navy in his youth and was, both during his reign and afterwards, nicknamed the "Sailor King". He served in North America and the Caribbean. In 1789, he was created Duke of Clarence and St Andrews. Since his two older brothers died without leaving legitimate issue, he inherited the throne when he was 64 years old. His reign saw several reforms: the poor law was updated, child labour restricted, slavery abolished in nearly all the British Empire, and the British electoral system refashioned by the Reform Act 1832. Although William did not engage in politics as much as his brother or his father, he was the last monarch to appoint a prime minister contrary to the will of Parliament. Through his brother, the Viceroy of Hanover, he granted his German kingdom a short-lived liberal constitution.

At the time of his death William had no surviving legitimate children, but he was survived by eight of the ten illegitimate children he had by the actress Dorothea Jordan, with whom he cohabited for twenty years. William was succeeded in the United Kingdom by his niece, Victoria, and in Hanover by his brother, Ernest Augustus.

See also

British monarchs
Monarchs of England before 1603

Æthelstan · Edmund I · Eadred · Eadwig · Edgar the Peaceful · Edward the Martyr · Æthelred the Unready · Sweyn Forkbeard · Edmund Ironside · Cnut the Great · Harold Harefoot · Harthacnut · Edward the Confessor · Harold Godwinson · Edgar the Ætheling · William I · William II · Henry I · Stephen · Matilda · Henry II · Henry the Young King · Richard I · John · Henry III · Edward I · Edward II · Edward III · Richard II · Henry IV · Henry V · Henry VI · Edward IV · Edward V · Richard III · Henry VII · Henry VIII · Edward VI · Jane · Mary I and · Philip · Elizabeth I

Monarchs of Scotland before 1603

Kenneth I MacAlpin · Donald I · Constantine I · Áed · Giric · Eochaid · Donald II · Constantine II · Malcolm I · Indulf · Dub · Cuilén · Amlaíb · Kenneth II · Constantine III · Kenneth III · Malcolm II · Duncan I · Macbeth · Lulach · Malcolm III Canmore · Donald III · Duncan II · Donald III · Edgar · Alexander I · David I · Malcolm IV · William I · Alexander II · Alexander III · Margaret · First Interregnum · John · Second Interregnum · Robert I · David II · Edward · Robert II · Robert III · James I · James II · James III · James IV · James V · Mary I · James VI

Monarchs of England and Scotland after the Union of the Crowns in 1603

James I & VI · Charles I · Commonwealth · Charles II · James II & VII · William III & II · Mary II · Anne

British monarchs after the Acts of Union 1707

Anne · George I · George II · George III · George IV · William IV · Victoria · Edward VII · George V · Edward VIII · George VI · Elizabeth II