Sir John McEwen, 1st Baronet

Sir John Helias Finnie McEwen, 1st Baronet (21 June 1894 – 19 April 1962), was a Scottish Unionist politician.

McEwen was the son of Robert Finnie McEwen. He was educated at Eton College and Trinity College, Cambridge. He served in the Cameron Highlanders in the First World War. After the war he joined the Diplomatic Service. He was elected to the House of Commons as Member of Parliament (MP) for Berwick and Haddington at the 1931 general election, and held the seat until 1945. He served under Neville Chamberlain as Under-Secretary of State for Scotland from 1939 to 1940 and under Winston Churchill as a Lord of the Treasury from 1942 to 1944. In 1953 he was created a Baronet, of Marchmont in the County of Berwick and Bardrochat in the County of Ayr.

McEwen married Brigid Mary, daughter of Sir Francis Oswald Lindley, in 1923 and they had seven children one of whom, the only daughter, was Christian Mary McEwen who married Frederick Fermor-Hesketh, 2nd Baron Hesketh. The family were brought up at Marchmont House on the east side of the small town of Greenlaw, Scotland.

He died in April 1962, aged 67, and was succeeded in the baronetcy by his eldest son James.