Sir Charles Wentworth Dilke, 1st Baronet (18 February 1810 – 10 May 1869), was an English art patron, horticulturalist and Whig politician. He is best remembered as one of the chief promoters of the Great Exhibition of 1851.
Dilke was born in London, the son of Charles Wentworth Dilke, proprietor and editor of The Athenaeum, by his wife Maria Dove Walker. He was educated at Westminster School and Trinity Hall, Cambridge. He helped pass the parliamentary Reform Act of 1832, enacted under the Whig administration of Lord Grey. He studied law, and in 1834 took his degree of LL.B., but did not practise.
Dilke assisted his father in his literary work, and was for some years chairman of the council of the Society of Arts, besides taking a prominent part in the affairs of the Royal Horticultural Society and other bodies. In 1841 he co-founded The Gardeners' Chronicle alongside Joseph Paxton, John Lindley and William Bradbury. He was one of the most zealous promoters of the Great Exhibition of 1851 (of which Paxton was again an integral part), and a member of the executive committee. At the close of the exhibition he was honoured by foreign sovereigns, and the queen offered him knighthood, which, however, he did not accept. He also declined a large remuneration offered by the royal commission. In 1853 Dilke was one of the English commissioners at the New York Industrial Exhibition, and prepared a report on it. He again declined to receive any money reward for his services.