The Russell Tribunal, also known as the International War Crimes Tribunal, Russell–Sartre Tribunal, or Stockholm Tribunal, was a private People's Tribunal organised in 1966 by Bertrand Russell, British philosopher and Nobel Prize winner, and hosted by French philosopher and writer Jean-Paul Sartre, along with Lelio Basso, Simone de Beauvoir, Vladimir Dedijer, Ralph Schoenman, Isaac Deutscher, Günther Anders and several others. The tribunal investigated and evaluated American foreign policy and military intervention in Vietnam.

Jean-Paul Charles Aymard Sartre was a French philosopher, playwright, novelist, screenwriter, political activist, biographer, and literary critic, considered a leading figure in 20th-century French philosophy and Marxism. Sartre was one of the key figures in the philosophy of existentialism. His work has influenced sociology, critical theory, post-colonial theory, and literary studies. He was awarded the 1964 Nobel Prize in Literature despite attempting to refuse it, saying that he always declined official honors and that "a writer should not allow himself to be turned into an institution."