Joseph Warner Henley, PC, DL, JP (3 March 1793 – 8 December 1884), often known as J. W. Henley, was a British Conservative politician, best known for serving in the protectionist governments of Lord Derby in the 1850s.
Henley sat as Member of Parliament for Oxfordshire from 1841 until 1878 and served as President of the Board of Trade in Derby's first (1852) and second (1858–1859) governments. He was sworn of the Privy Council in 1852. From 1874 to 1878 (year of his 84th birthday) he was the oldest member of the House of Commons.
Henley married Georgiana, daughter of John Fane, in 1816. She died in June 1864. Henley died in December 1884, aged 91.