Here follows a list of children and legitimate grandchildren and great-grandchildren of George III, King of the United Kingdom and his wife, Charlotte of Mecklenburg-Strelitz. Their fifteen children include George IV of the United Kingdom, William IV of the United Kingdom, and Ernest Augustus, King of Hanover. Their grandchildren include Queen Victoria of the United Kingdom and King George V of Hanover. Their great-grandchildren include King Edward VII of the United Kingdom and Ernest Augustus, Crown Prince of Hanover.
| Name | Birth | Death | width=450 | Notes[1] |
|---|---|---|---|---|
| George IV | 12 August 1762 | 26 June 1830 | married 1795, Caroline of Brunswick; had issue | |
| Frederick, Duke of York | 16 August 1763 | 5 January 1827 | married 1791, Princess Frederica Charlotte of Prussia; no issue | |
| William IV | 21 August 1765 | 20 June 1837 | married 1818, Princess Adelaide of Saxe-Meiningen; no surviving legitimate issue | |
| Charlotte, Princess Royal | 29 September 1766 | 6 October 1828 | married 1797, Frederick I of Württemberg; no surviving issue | |
| Edward, Duke of Kent | 2 November 1767 | 23 January 1820 | married 1818, Princess Victoria of Saxe-Coburg-Saalfeld; had issue | |
| Princess Augusta Sophia | 8 November 1768 | 22 September 1840 | ||
| Princess Elizabeth | 22 May 1770 | 10 January 1840 | married 1818, Frederick, Landgrave of Hesse-Homburg; no issue | |
| Ernest Augustus, King of Hanover | 5 June 1771 | 18 November 1851 | married 1815, Frederica of Mecklenburg-Strelitz; had issue | |
| Augustus, Duke of Sussex | 27 January 1773 | 21 April 1843 | married (1) 1793 (in contravention with the Royal Marriages Act 1772) Lady Augusta Murray; annulled 1794; had issue; (2) 1831 (again in contravention of the Act) Cecilia Underwood, Duchess of Inverness; no issue | |
| Adolphus, Duke of Cambridge | 24 February 1774 | 8 July 1850 | married 1818, Princess Augusta of Hesse-Kassel; had issue | |
| Princess Mary, Duchess of Gloucester | 25 April 1776 | 30 April 1857 | married 1815, Prince William, Duke of Gloucester; no issue | |
| Princess Sophia | 3 November 1777 | 27 May 1848 | ||
| Prince Octavius | 23 February 1779 | 3 May 1783 | ||
| Prince Alfred | 22 September 1780 | 20 August 1782 | ||
| Princess Amelia | 7 August 1783 | 2 November 1810 |
| Name | Birth | Death | Notes | |
|---|---|---|---|---|
| Princess Charlotte Augusta of Wales | 7 January 1796 | 6 November 1817 | married 1816, Prince Leopold of Saxe-Coburg-Saalfeld; no surviving issue, died in first childbirth | |
| Princess Charlotte of Clarence | 21 March 1819 | 21 March 1819 | ||
| Princess Elizabeth of Clarence | 10 December 1820 | 4 March 1821 | ||
| Queen Victoria | 24 May 1819 | 22 January 1901 | married 1840, Prince Albert of Saxe-Coburg and Gotha; had issue | |
| George V of Hanover | 27 May 1819 | 12 June 1878 | married 1843, Marie of Saxe-Altenburg; had issue | |
| Prince George, Duke of Cambridge | 26 March 1819 | 17 March 1904 | married 1847, Sarah Fairbrother; had issue (in contravention of Royal Marriages Act 1772. All issue illegitimate) | |
| Princess Augusta of Cambridge | 19 July 1822 | 5 December 1916 | married 1843, Friedrich Wilhelm, Grand Duke of Mecklenburg-Strelitz; had issue | |
| Princess Mary Adelaide of Cambridge | 27 November 1833 | 27 October 1897 | married 1866, Francis, Duke of Teck; had issue |
1. daughter of Charlotte, Princess Royal (April 27, 1798)
2. Frederica von Hanover, daughter of Ernest August of Cumberland (January 27, 1817)
3. daughter of Ernest Augustus of Cumberland (April 1818)
4. son or daughter of William IV (September 5, 1819)
5. twin sons of William IV (April 8, 1822)
Princess Charlotte, the Prince of Wales's daughter, was, for the whole of her life, the King's only legitimate grandchild. With her death in 1817, the King's unmarried sons scrambled to find appropriate wives from among the German princesses and produce heirs to the throne; but before this, many had been content to keep mistresses or, in the cases of the Prince of Wales and the Duke of Sussex, to marry invalidly. As a result, George III and Queen Charlotte had numerous illegitimate grandchildren.
| Name | Birth | Death | Notes | |
|---|---|---|---|---|
| Alleged children of Frederick, Duke of York | ||||
| 1786 | 1832 | |||
| 30 March 1787 | 5 July 1873 | Legally his father was John Gibbes, his mother's husband. | ||
| c. 1789 | 6 October 1867 | Said to be the son of Sarah Hussey, Countess of Tyrconnel, fostered and raised by the Molloys. | ||
| Frederick George Vandiest | 1800 | 1848 | ||
| Louisa Ann Vandiest | 1802 | 1890 | ||
| Children of William IV (then Duke of Clarence) by Dorothea Jordan | ||||
| 29 January 1794 | 20 March 1842 | married 1819, Mary Wyndham; had issue | ||
| 27 March 1795 | September 1817 | Died unmarried, aged 22. | ||
| August 1796 | 10 April 1837 | married 1825, Philip Sidney, 1st Baron De L'Isle and Dudley; had issue | ||
| 19 December 1798 | 13 July 1864 | married 1824, General Charles Richard Fox; no issue | ||
| 9 December 1799 | 30 October 1854 | married 1821, Lady Augusta Boyle; had issue | ||
| 17 January 1801 | 16 January 1856 | married 1820, William Hay, 18th Earl of Erroll; had issue | ||
| 18 February 1802 | 17 Mary 1856 | |||
| 17 November 1803 | 8 December 1865 | married 1827, the Hon. John Kennedy-Erskine; had issue; married 1854, Lord John Hallyburton; no issue | ||
| 1 March 1805 | 14 June 1854 | married 1845, Sarah Gordon; had issue | ||
| 21 March 1807 | 2 July 1858 | married 1830, Lucius Cary, 10th Viscount Falkland | ||
| Children of Augustus, Duke of Sussex, by Lady Augusta Murray | ||||
| 1794 | 1848 | |||
| 1801 | May 1866 | married 1845, Thomas Wilde, 1st Baron Truro; no issue | ||
| Alleged child of Sophia | ||||
| Thomas Garth | 1800 | 1875 | Alleged child born from Thomas Garth. |