Under-Secretary of State for Foreign Affairs
Parliamentary Under-Secretaries of State for Foreign Affairs, 1782–1968
- 1782: Richard Brinsley Sheridan and William Fraser
- 1782: George Maddison (replacing Sheridan)
- 1783: The Hon. St Andrew St John and William Fraser
- 1789: James Bland Burgess and Dudley Ryder
- August 1789: James Bland Burgess
- January 1796: George Canning
- April 1799: John Hookham Frere
- September 1800: Edward Fisher
- February 1801: Lord Hervey
- November 1803: Charles Arbuthnot
- June 1804: The Hon. William Eliot
- February 1805: Robert Ward
- February 1806: The Hon. George Walpole and Sir Francis Vincent, Bt
- March 1807: Viscount FitzHarris
- August 1807: The Hon. Charles Bagot
- December 1809: Culling Charles Smith
- February 1812: Edward Cooke
- January 1822: Earl of Clanwilliam
- January 1823: Lord Francis Conyngham
- July 1824: Lord Howard de Walden
- January 1826: Marquess of Clanricarde
- June 1828: Lord Dunglass
- November 1830: Sir George Shee, Bt
- November 1834: Viscount Fordwich
- December 1834: Viscount Mahon
- April 1835: The Hon. William Thomas Horner Fox-Strangways
- March 1840: Viscount Leveson
- September 1841: Viscount Canning
- January 1846: The Hon. George Augustus Frederick Percy Sydney Smythe
- July 1846: Edward John Stanley
- February 1852: Austen Henry Layard
- May 1852: Lord Stanley
- December 1852: Lord Wodehouse
- July 1856: Earl of Shelburne
- February 1858: William Robert Seymour Vesey Fitzgerald
- June 1859: Lord Wodehouse
- August 1861: Austen Henry Layard
- July 1866: Edward Christopher Egerton
- December 1868: Arthur John Otway
- January 1871: Viscount Enfield
- February 1874: R. Bourke
- April 1880: Sir Charles Dilke
- January 1883: Lord E. Fitzmaurice
- June 1885: R. Bourke
- February 1886: James Bryce
- August 1886: Sir J. Ferguson
- September 1891: J. W. Lowther
- August 1892: Sir Edward Grey
- June 1895: George Nathaniel Curzon
- October 1898: William St John Brodrick
- November 1900: Viscount Cranborne
- October 1903: Earl Percy
- December 1905:
incomplete
Permanent Under-Secretaries of State for Foreign Affairs, 1790–1968
- February 1790: George Aust
- October 1795: George Hammond (resigned 1806)
- March 1807: George Hammond
- October 1809: William Richard Hamilton
- July 1817: Joseph Planta
- April 1827: John Backhouse
- 1842: Henry U. Addington
- 1854: Edmund Hammond (later Lord Hammond)
- 1873: Lord Tenterden
- 1882: Sir Julian Pauncefote (later Lord Pauncefote)
- 1889: Sir Philip Currie
- 1894: Sir T.H. Sanderson (later Lord Sanderson)
- 1906: Sir Charles Hardinge (later Lord Hardinge of Penshurst)
- 1910: Sir Arthur Nicolson
- 1916: Lord Hardinge of Penshurst
- 1920: Sir Eyre Crowe
- 1925: Sir William Tyrrell
- 1928: Sir Ronald Lindsay
- 1930: Sir Robert Vansittart
- 1938: Sir Alexander Cadogan
- 1946: Sir Orme Sargent (jointly with Sir W. Strang, Head of the German Section 1947–1949)
- 1949: Sir William Strang (jointly with the Heads of the German Section: Sir Ivone Kirkpatrick 1949–1950, Sir D. Gainer 1950–1951)
- 1953: Sir Ivone Kirkpatrick
- 1957: Sir Frederick Hoyer Millar
- 1962: Sir Harold Caccia
- 1965: Sir Paul Gore-Booth (also Head of the Diplomatic Service from 1968)