John Gathorne-Hardy, 2nd Earl of Cranbrook

John Stewart Gathorne-Hardy, 2nd Earl of Cranbrook (born 22 March 1839 – 13 July 1911) was a British peer and Conservative Member of Parliament.

Born John Stewart Hardy, Lord Cranbrook was the eldest son of the Conservative politician Gathorne Gathorne-Hardy, 1st Earl of Cranbrook, and Jane Stewart Orr. He assumed the additional surname of Gathorne by Royal licence in 1878 and when his father was elevated to the peerage as Earl of Cranbrook in 1892, he gained the courtesy title of Lord Medway. Cranbrook was elected to the House of Commons for Rye in 1868, a seat he held until 1880, and later represented Mid Kent from 1884 to 1885 and Medway from 1885 to 1892. In 1906, he succeeded his father as second Earl of Cranbrook and took his seat in the House of Lords. In 1867, Lord Cranbrook married Cicely Marguerite Wilhelmina Ridgway, daughter of Joseph Ridgway and Selina Harriet Doyle (died 1861, Egypt). Their eldest son Gathorne succeeded as the 3rd Earl of Cranbrook. His daughter, Lady Dorothy Milner Gathorne-Hardy, married Rupert D'Oyly Carte, founder of the Savoy Hotel. Their second son, Hon. Sir John Francis Gathorne-Hardy, was a distinguished general in the army.

Lord Cranbrook died in July 1911, aged 72, and was succeeded by his eldest son, Gathorne Gathorne-Hardy, 3rd Earl of Cranbrook. Lady Cranbrook, his wife, died in 1931.