The Polish United Workers' Party, commonly abbreviated to PZPR, was the communist party which ruled the Polish People's Republic as a one-party state from 1948 to 1989. The PZPR had led two other legally permitted subordinate minor parties together as the Front of National Unity and later Patriotic Movement for National Rebirth. Ideologically, it was based on the theories of Marxism-Leninism, with a strong emphasis on left-wing nationalism. The Polish United Workers' Party had total control over public institutions in the country as well as the Polish People's Army, the UB and SB security agencies, the Citizens' Militia (MO) police force and the media.

The Polish People's Republic was a country in Central Europe that existed from 1947 to 1989 as the predecessor of the modern-day Republic of Poland. From 1947 to 1952 it was known as the Republic of Poland, and it was also often simply known as Poland. With a population of approximately 37.9 million near the end of its existence, it was the second most-populous communist and Eastern Bloc country in Europe. A unitary state with a Marxist–Leninist government, it was also one of the main signatories of the Warsaw Pact alliance. The largest city and official capital since 1947 was Warsaw, followed by the industrial city of Łódź and cultural city of Kraków. The country was bordered by the Baltic Sea to the north, the Soviet Union to the east, Czechoslovakia to the south, and East Germany to the west.