(from Russian (Russian literature) sam, “self,” and izdatelstvo, “publishing”), literature secretly written, copied, and circulated in the former Soviet Union (Union of Soviet Socialist Republics) and usually critical of practices of the Soviet government.

Samizdat began appearing following Joseph Stalin's death in 1953, largely as a revolt against official restrictions on the freedom of expression of major dissident Soviet authors. After the ouster of Nikita S. Khrushchev in 1964, samizdat publications expanded their focus beyond freedom of expression to a critique of many aspects of official Soviet policies and activities, including ideologies, culture, law, economic policy, historiography, and treatment of religions and ethnic minorities. Because of the government's strict monopoly on presses, photocopiers, and other such devices, samizdat publications typically took the form of carbon copies of typewritten sheets and were passed by hand from reader to reader.

The major genres of samizdat included reports of dissident activities and other news suppressed by official media, protests addressed to the regime, transcripts of political trials, analysis of socioeconomic and cultural themes, and even pornography.

In its earliest days, samizdat was largely a product of the intelligentsia of Moscow and Leningrad. But it soon fomented analogous underground literatures throughout the constituent republics of the Soviet Union and among its many ethnic minorities.

From its inception, the samizdat movement and its contributors were subjected to surveillance and harassment by the KGB, the secret police. The suppression worsened in the early 1970s, at the height of samizdat activity. Culminating in a show trial of Pyotr Yakir and Victor Krasin in August 1973, the government's assault wounded the movement. But it survived, though reduced in numbers and deprived of many of its leaders.

Samizdat began to flourish again in the mid-1980s because of Soviet leader Mikhail Gorbachev's policy of glasnost (“openness”). KGB harassment virtually ceased, and as a result a variety of independent journals proliferated, though their readership remained tiny. By the late 1980s, the Soviet government had unofficially accepted samizdat, although it retained its monopoly on printing presses and other media outlets. Samizdat had almost disappeared by the early 1990s following the collapse of the Soviet Union and the emergence of media outlets that were largely independent of government control.