Raymond Henry Williams (31 August 1921 – 26 January 1988) was a Welsh socialist writer, academic, novelist and critic influential within the New Left and in wider culture. His writings on politics, culture, the media and literature contributed to the Marxist critique of culture and the arts. Some 750,000 copies of his books were sold in UK editions alone, and there are many translations available. His work laid foundations for the field of cultural studies and cultural materialism.

Born in Pandy, just north of Llanfihangel Crucorney, near Abergavenny, Wales, Williams was the son of a railway worker in a village where all of the railwaymen voted Labour, while the local small farmers mostly voted Liberal. It was not a Welsh-speaking area: he described it as "Anglicised in the 1840s". There was, nevertheless, a strong Welsh identity. "There is the joke that someone says his family came over with the Normans and we reply: 'Are you liking it here?'"

Williams attended King Henry VIII Grammar School in Abergavenny. His teenage years were overshadowed by the rise of Nazism and the threat of war. His father was secretary of the local Labour Party, but Raymond declined to join, although he did attend meetings around the 1935 general election. He was 14 when the Spanish Civil War broke out, and was conscious of what was happening through his membership of the local Left Book Club. He also mentions the Italian invasion of Abyssinia (Ethiopia) and Edgar Snow's Red Star Over China, originally published in Britain by the Left Book Club.

At this time, he supported the League of Nations, attending a League-organised youth conference in Geneva in 1937. On the way back, his group visited Paris and he went to the Soviet pavilion at the International Exhibition. There he bought a copy of The Communist Manifesto and read Karl Marx for the first time.

In July 1939, he was involved in the Monmouth by-election, helping with an unsuccessful campaign by the Labour candidate, Frank Hancock, who was a pacifist. Williams was also a pacifist at this time, having distributed leaflets for the Peace Pledge Union.

Williams won a state scholarship to read English at Trinity College, Cambridge, matriculating in 1939. While at Cambridge, he joined the Communist Party of Great Britain. Along with Eric Hobsbawm, he was given the task of writing a Communist Party pamphlet about the Russo-Finnish War. He says in (Politics and Letters) that they "were given the job as people who could write quickly, from historical materials supplied for us. You were often in there writing about topics you did not know very much about, as a professional with words".

At the time, the British government was keen to support Finland in its war against the Soviet Union, while still being at war with Nazi Germany. He took a second (division two) in part one of the tripos in 1941, and, after returning from war service, achieved first-class honours in part two in 1946. He graduated from the University of Cambridge with a BA degree in 1946: as per tradition, his BA was promoted to a Master of Arts (MA Cantab) degree. He was later awarded a higher doctorate by Cambridge: the Doctor of Letters (LittD) degree in 1969.

Williams interrupted his education to serve in the Second World War. He enlisted in the British Army in late 1940, but stayed at Cambridge to take his exams in June 1941, the month when Germany invaded Russia. Joining the military was against the Communist party line at the time. According to Williams, his Communist Party membership lapsed without him formally resigning.