The Secretary of State headed the War Office and was assisted by a Parliamentary Private Secretary , who was also a Member Of Parliament , and a Military Secretary , who was a General .
- Henry Pelham-Clinton, 5th Duke Of Newcastle ( June 12 , 1854 - January 30 , 1855 )
- Fox Maule, 2nd Baron Panmure ( February 8 , 1855 - February 21 , 1858 )
- Jonathan Peel ( February 26 , 1858 - June 11 , 1859 )
- Sidney Herbert ( June 18 , 1859 - July 22 , 1861 )
- Sir George Cornewall Lewis ( July 23 , 1861 - April 13 , 1863 ) (died in office)
- George Robinson, 3rd Earl De Grey ( April 28 , 1863 - February 16 , 1866 )
- Spencer Compton Cavendish, Marquess Of Hartington ( February 16 , 1866 - June 26 , 1866 )
- Jonathan Peel ( July 6 , 1866 - March 8 , 1867 )
- Sir John Pakington ( March 8 , 1867 - December 1 , 1868 )
- Edward Cardwell ( December 9 , 1868 - February 17 , 1874 )
- Gathorne Hardy ( February 21 , 1874 - April 2 , 1878 )
- Sir Frederick Arthur Stanley ( April 2 , 1878 - April 21 , 1880 )
- Hugh Culling Eardley Childers ( April 28 , 1880 - December 16 , 1882 )
- Spencer Compton Cavendish, Marquess Of Hartington ( December 16 , 1882 - June 9 , 1885 )
- William Henry Smith ( June 24 , 1885 - January 21 , 1886 )
- Gathorne Gathorne-Hardy, 1st Viscount Cranbrook ( January 21 , 1886 - February 6 , 1886 )
- Sir Henry Campbell-Bannerman ( February 6 , 1886 - July 20 , 1886 )
- William Henry Smith ( August 3 , 1886 - January 14 , 1887 )
- Edward Stanhope ( January 14 , 1887 - August 11 , 1892 )
- Sir Henry Campbell-Bannerman ( August 18 , 1892 - June 21 , 1895 )
- Henry Charles Keith Petty-Fitzmaurice, 5th Marquess Of Lansdowne ( July 4 , 1895 - November 12 , 1900 )
- William St John Brodrick ( November 12 , 1900 - October 6 , 1903 )
- Hugh Oakeley Arnold-Forster ( October 6 , 1903 - December 4 , 1905 )
- Richard Burdon Haldane , 1st Viscount Haldane (1911) ( December 10 , 1905 - June 12 , 1912 )
- John Seely ( June 12 , 1912 - March 30 , 1914 ) (resigned)
- Herbert Henry Asquith ( March 30 , 1914 - August 5 , 1914 )
- Horatio Herbert Kitchener, 1st Earl Kitchener Of Khartoum ( August 5 , 1914 - July 5 , 1916 ) (died in office)
- David Lloyd George ( July 6 , 1916 - December 5 , 1916 ) (resigned)
- Edward George Villiers Stanley, 17th Earl Of Derby ( December 10 , 1916 - April 18 , 1918 )
- Alfred Milner, 1st Viscount Milner ( April 18 , 1918 - January 10 , 1919 )
- Winston Churchill ( January 10 , 1919 - February 13 , 1921 )
- Sir Laming Worthington-Evans ( February 13 , 1921 - October 19 , 1922 )
- Edward George Villiers Stanley, 17th Earl Of Derby ( October 24 , 1922 - January 22 , 1924 )
- Stephen Walsh ( January 22 , 1924 - November 3 , 1924 )
- Sir Laming Worthington-Evans ( November 6 , 1924 - June 4 , 1929 )
- Thomas Shaw ( June 7 , 1929 - August 24 , 1931 )
- Robert Crewe-Milnes, 1st Marquess Of Crewe ( August 25 , 1931 - November 5 , 1931 )
- Douglas McGarel Hogg, 1st Viscount Hailsham ( November 5 , 1931 - June 7 , 1935 )
- Edward Frederick Lindley Wood, 3rd Viscount Halifax ( June 7 , 1935 - November 22 , 1935 )
- Alfred Duff Cooper ( November 22 , 1935 - May 28 , 1937 )
- Leslie Hore-Belisha ( May 28 , 1937 - January 5 , 1940 ) (dismissed)
- Oliver Stanley ( January 5 , 1940 - May 11 , 1940 )
- Anthony Eden ( May 11 , 1940 - December 22 , 1940 )
- David Margesson ( December 22 , 1940 - February 22 , 1942 )
- Sir P.J. Grigg ( February 22 , 1942 - July 26 , 1945 )
- Jack Lawson ( August 3 , 1945 - October 4 , 1946 )
- Frederick Bellenger ( October 4 , 1946 - October 7 , 1947 )
- Emanuel Shinwell ( October 7 , 1947 - February 28 , 1950 )
- John Strachey ( February 28 , 1950 - October 26 , 1951 )
- Anthony Head, 1st Viscount Head ( October 31 , 1951 - October 18 , 1956 )
- John Hare, 1st Viscount Blakenham ( October 18 , 1956 - January 6 , 1958 )
- Christopher Soames ( January 6 , 1958 - July 27 , 1960 )
- John Profumo ( July 27 , 1960 - June 5 , 1963 ) (resigned)
- Joseph Godber ( June 27 , 1963 - October 21 , 1963 )
- James Ramsden ( October 21 , 1963 - April 1 , 1964 )
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