Sir Harry Julian Stonor GCVO (17 November 1859 – 5 May 1939) was a British courtier who served in several successive Royal Households of the United Kingdom.
In 1881 he was granted the style and precedence of the younger son of a Baron by Royal Warrant when his brother, Francis, succeeded to his grandfather's barony.
In 1883 Stonor joined the Royal Household as a Gentleman Usher and Quarterly Waiter to Queen Victoria, holding the positions until her death in 1901.
He then became Groom in Waiting to Edward VII for the duration of his reign, and fulfilled the same role in the Household of George V from 1910 to 1936.
From 1918 to 1921 he was Deputy Master of the Royal Household, and between 1924 and 1939 he was Secretary and Registrar of the Order of Merit.