Index on Censorship is an organisation campaigning for freedom of expression. It produces a quarterly magazine of the same name from London. It is directed by the non-profit-making Writers and Scholars International, Ltd (WSI) in association with the UK-registered charity Index on Censorship (founded as the Writers and Scholars Educational Trust), which are both chaired by the British television broadcaster, writer and former politician Trevor Phillips. The current CEO is Jemimah Steinfeld.
WSI was created by poet Stephen Spender, Oxford philosopher Stuart Hampshire, the publisher and editor of The Observer David Astor, and the writer and expert on the Soviet Union Edward Crankshaw. The founding editor of Index on Censorship was the critic and translator Michael Scammell (1972–1981), who still serves as a patron of the organisation.