Edward John Sidney Christian Welbore Ellis Agar, 5th Earl of Normanton (29 March 1910 – 28 January 1967) was a British and Irish peer, soldier, and landowner, a member of the House of Lords from 1933 until his death.
From birth until 1933 he was known by the courtesy title of Viscount Somerton.
As Viscount Somerton, Normanton was commissioned into the Royal Horse Guards. On 25 November 1933, he succeeded his father as Earl of Normanton, Viscount Somerton, and Baron Somerton, all in the peerage of Ireland, and as Baron Somerton of Somerley in the peerage of the United Kingdom. The last of these gave him a seat in the House of Lords. From his father, he also inherited Somerley House in Hampshire and an estate of some 7,000 acres, and an art collection which included the Somerley Venus and Adonis by Titian.
On 13 November 1935, Normanton resigned his commission and transferred as a lieutenant from the active list to the Regular Army Reserve of Officers. During the Second World War, he returned to the army and rose to the rank of Captain.
He died in 1967 aged only 56, without having planned for the inheritance tax on his estate, and as a result, his son owed 88 per cent of the value of the property for that.