Sir Edward Howard Marsh KCVO CB CMG (18 November 1872 – 13 January 1953) was a British polymath, translator, arts patron and civil servant. He was the sponsor of the Georgian school of poets and a friend to many poets, including Rupert Brooke and Siegfried Sassoon. In his career as a civil servant he worked as Private Secretary to a succession of Great Britain's most powerful ministers, particularly Winston Churchill. He was a discreet but influential figure within Britain's homosexual community.
Marsh's father was Howard Marsh, a surgeon and later Master of Downing College, Cambridge. His mother, born Jane Perceval, was a granddaughter of prime minister Spencer Perceval. Jane, a nurse, was one of the founders of the Alexandra Hospital for Children with Hip Disease; Howard was a surgeon at the hospital. Marsh was educated at Westminster School, London, and Trinity College, Cambridge, where he studied classics under Arthur Woollgar Verrall. He was a Cambridge Apostle.
In 1896 he was appointed Assistant Private Secretary to Joseph Chamberlain, the Colonial Secretary. When Chamberlain resigned in 1903, Marsh became private secretary to his successor, Alfred Lyttelton. When Winston Churchill became Under-Secretary of State for the Colonies in 1905 during Henry Campbell-Bannerman's first Government, Marsh became Churchill's Private Secretary, beginning an association and friendship that would last through Marsh's death. Marsh would be Churchill's Private Secretary for the next ten years, until Churchill left the Government in 1915. As Randolph Churchill put it, from December 1905, "Marsh was to accompany Churchill to every Government department he occupied: to the Board of Trade, the Home Office, the Admiralty, the Duchy of Lancaster, the Ministry of Munitions, the War Office, back to his original Colonial Office and the Treasury." These moves were somewhat irregular as Marsh remained, until 1937, officially a clerk at the Colonial Office, but many exceptions were made, possibly at a cost to Marsh's official advancement.