Birth: 3 October 1755
Place or Registered Place of Birth: Dartmouth, Devon
Baptism: Not Known
Place of Baptism: Not Known
Death: 10 November 1810 - Aged 55
Place or Registered Place of Death: Not Known
Father: William Legge, 2nd Earl of Dartmouth (1731-1801)
Mother: Frances Catherine Gunter Nicoll (1733-1805)
Spouse(s): Frances Finch
Date of Marriage: 24 September 1782
Place or Registered Place of Marriage: Grosvenor Square, London, Middlesex
William Legge (1784-1853)
Louisa Legge (1787-1816)
Heneage Legge (1788-1844)
Henrietta (Harriet) Legge (1790-1855)
Charlotte Legge (1795-1877)
Georgina Caroline Legge (1795-1855)
Mary Legge (1796-1886)
Anne Legge (1797-1885)
Charles Legge (1799-1821)
Arthur Charles Legge (1800-1890)
Barbara Maria Legge (-1840)
Henry Legge (1803-1887)
Dartmouth was the eldest son of William Legge, 2nd Earl of Dartmouth, and Frances Katherine, daughter of Sir Charles Gounter Nicoll. He was the elder brother of Admiral the Hon. Sir Arthur Kaye Legge and the Hon. Edward Legge, Bishop of Oxford.
Dartmouth was returned to Parliament for Plymouth in 1778, a seat he held until 1780. The latter year he was returned for both Horsham and Staffordshire 1784, but chose to represent the latter. He continued to represent this constituency until 1784. From 1783 to 1798 he served as Lord Warden of the Stannaries.
He remained out of parliament for the next 17 years, but in 1801 he was summoned to the House of Lords through a writ of acceleration in his father's junior title of Baron Dartmouth. He succeeded his father in the earldom later the same year. Dartmouth served under Henry Addington as President of the Board of Control between 1801 and 1802 and as Lord Steward between 1802 and 1804. From 1804 to 1810 he was Lord Chamberlain under successively Pitt the Younger, Lord Grenville, the Duke of Portland and Spencer Perceval. He was sworn of the Privy Council in 1801 and appointed a Knight of the Garter in 1805. He was also admitted a Fellow of the Royal Society on 3 May 1781.
Lord Dartmouth married Lady Frances (d. 1810), daughter of Heneage Finch, 3rd Earl of Aylesford, on 24 September 1782. They had twelve children:
Lady Harriet Legge (d. 11 March 1855), married in 1815 General Hon. Sir Edward Paget, son of Henry Paget, 1st Earl of Uxbridge and had issue.
William Legge, 4th Earl of Dartmouth (1784–1853)
Lady Louisa Legge (8 March 1787 – 13 August 1816), married William Bagot, 2nd Baron Bagot and had issue.
Hon. Henage Legge (29 February 1788 – 12 December 1844), married Mary Johnstone.
Lady Charlotte Legge (1795 – 15 June 1877), married in 1816 Very Rev. Hon. George Neville-Grenville (Dean of Windsor), son of Richard Griffin, 2nd Baron Braybrooke and had issue.
Lady Georgina Caroline Legge (c. 1795 – 11 August 1855)
Lady Mary Legge (c. 1796 – 8 July 1886)
Lady Anne Legge (c. 1797 – 24 November 1885)
Hon. Charles Legge (1799–1821)
General Hon. Arthur Charles Legge (25 June 1800 – 18 May 1890), married first on 1 June 1827 Lady Anne Holroyd (d. 1829), daughter of John Holroyd, 1st Earl of Sheffield, second on 29 August 1837 Caroline Bouwens and had issue.
Lady Barbara Maria Legge (d. 22 April 1840), married in 1820 Francis Parker Newdigate and had issue
Hon. Henry Legge (1803 – 13 February 1887), vicar of Lewisham, married on 12 May 1842 Maria Rogers (d. 1890), daughter of Sir Frederick Rogers, 7th Baronet.
Lord Dartmouth died on 10 November 1810, aged 55, and was succeeded in the earldom by his eldest son, William. Lady Dartmouth only survived her husband by eleven days and died on 21 November 1810.
George Legge, 3rd Earl of Dartmouth succeeded to the title of 4th Baron Dartmouth, of Dartmouth, Devon [E., 1682] on 15 July 1801. He succeeded to the title of 3rd Viscount Lewisham, of co. Kent [G.B., 1711] on 15 July 1801. He succeeded to the title of 3rd Earl of Dartmouth [G.B., 1711] on 15 July 1801. He was invested as a Knight, Order of the Garter (K.G.) in 1805 although he was invested but nevere installed. He had another son and three other daughters.
3rd Earl of Dartmouth