Henry Edward Duke, 1st Baron Merrivale PC (5 November 1855 – 20 May 1939) was a British judge and Conservative politician.

As a child, Duke worked as a journalist for the local newspaper the Western Morning News, but at age 25 he came to London to cover the House of Commons.

Duke sat on the front opposition bench during the early years of the First World War and was admitted to the Privy Council in 1915.

The political situation in Ireland remained strained during Duke's tenure as Chief Secretary, notably over the Conscription Crisis of 1918, and he resigned in May 1918.

He also dissented at the Court of Appeal level in the famous case of Attorney-General v De Keyser's Royal Hotel Ltd, [1919] 2 Ch.