Colonel Harry Leslie Blundell McCalmont, CB (30 May 1861 – 8 December 1902) was a British army officer, race-horse owner, yachtsman and Conservative party politician.

He was the son of Hugh Barklie Blundell McCalmont, and was educated at Eton College before gaining a commission in the 6th Regiment of Foot in 1881.

[3] In 1895 a general election was called, and McCalmont was selected as Conservative candidate for the Newmarket constituency, then held by the Liberals.

King Edward VII visited McCalmont for shooting at Cheveley park in November 1902, as part of a trip to Newmarket.

A sister-in-law was Lillie Langtry, who married the son of Sir Henry, Hugo Gerald de Bathe, in 1899.