Lieutenant General Michael George Henry Barker, CB, DSO & Bar, DL (15 October 1884 – 21 May 1960) was a British Army officer who fought in both world wars, notably as commander of I Corps during the Battle of France in May 1940.

[6] During the Second World War, Barker served as commander of I Corps from April 1940, before being replaced during the latter stages of the Battle of Dunkirk by Major General The Hon.

His performance there was undistinguished; according to Alan Brooke, commanding II Corps, Barker suffered a nervous breakdown; he was "overwrought with work (and was) impossible to deal with".

[7] His then-subordinate, Bernard Montgomery, remarked that "only a madman would give a corps to Barker."

[8] He was the father of Michael John Eustace Barker (1915–1995) who became a merchant sailor and was, allegedly, the lover of Stephen Spender and, later, W. H. Auden for a time during the Second World War.