Cayley is a surname. Notable people with the surname include:
Arthur Cayley (1821–1895), British mathematician Beverley Cochrane Cayley (1898–1928), Canadian lawyer and mountaineer Charles Cayley (1823–1883), British linguist and friend of Christina Rossetti Cornelius Cayley (1727–1779), British religious writer and preacher David Cayley Canadian broadcaster and writer Dorothy Cayley (1874–1955), British mycologist Douglas Edward Cayley (1870–1951), British Army major-general, son of Henry Cayley, brother of Henry Priaulx Cayley and Walter Cayley Edward Cayley (1802–1862), British Member of Parliament Forde Everard de Wend Cayley (1915–2004), British physician held by the Japanese as a prisoner of war during the Second World War G. C. Cayley (1866–1944), senior Royal Navy and Royal Air Force officer George Cayley (1773–1857), English naturalist, physical scientist, engineer, inventor, politician, and pioneer of flight Henry Cayley (1834–1904), Deputy Surgeon-General and the British army in India, honorary surgeon to Queen Victoria and King Edward VII Henry Douglas Cayley (1904–1991), British banker Henry Priaulx Cayley (1877–1942), Royal Australian Navy rear admiral, son of Henry Cayley, brother of Douglas Edward Cayley and Walter Cayley Hugh Cayley (1857–1934), Canadian lawyer, journalist and politician John Cayley (1956–), Canadian writer, electronic writer and theorist Kate Cayley, Canadian writer and theatre director Michael Cayley (1842–1878), Quebec/Canadian lawyer and politician Neville Henry Cayley (1853–1903), Australian painter Neville William Cayley (1886–1950), Australian author, artist and amateur ornithologist Richard Cayley (1833–1908), British lawyer, 14th Chief Justice of Ceylon and 14th Queen's Advocate of Ceylon Richard Cayley (Royal Navy officer) (1907–1943), British Second World War submarine commander, son of Douglas Cayley Thomas Merritt Cayley (1878–1933), Canadian Member of Parliament Walter de Sausmarez Cayley (1863–1952), British Army major general, son of Henry Cayley, brother of Douglas Edward Cayley and Henry Priaulx Cayley William Cayley (disambiguation)