Propaganda was a tool of the Nazi Party in Germany from its earliest days to the end of the regime in May 1945 at the end of World War II in Europe. As the party gained power, the scope and efficacy of its propaganda grew and permeated an increasing amount of space in Germany and, eventually, beyond.

Adolf Hitler's Mein Kampf (1925) provided the groundwork for the party’s later methodology while the newspapers, the Völkischer Beobachter and later Der Angriff, served as the early practical foundations for later propaganda during the party's formative years. These were later followed by many media types including books, posters, magazines, photos, art, films, and radio broadcasts which took increasingly prominent roles as the party gained more power.

These efforts promulgated Nazi ideology throughout German society. Such ideology included promotion of Nazi policies and values at home, worldview beyond their borders, antisemitism, vilification of non-German peoples and anti-Nazi organizations, eugenics and eventually total war against the Allied Nations.

After Germany's defeat and subsequent surrender on 7 May 1945, the Allied governments banned all forms of Nazi propaganda and the organizations which produced and disseminated such materials during the years of denazification.

Nazi propaganda promoted Nazi ideology by demonising the enemies of the Nazi Party, notably Jews and communists, but also capitalists and intellectuals. It promoted the values asserted by the Nazis, including heroic death, Führerprinzip (leader principle), Volksgemeinschaft (people's community), Blut und Boden (blood and soil), and pride in the Germanic Herrenvolk (master race). Propaganda was also used to maintain the cult of personality around Nazi leader Adolf Hitler, and to promote campaigns for eugenics and the annexation of German-speaking areas. After the outbreak of World War II, Nazi propaganda vilified Germany's enemies, notably the United Kingdom, the Soviet Union, and the United States, and in 1943 exhorted the population to total war.

Adolf Hitler devoted two chapters of his 1925 book Mein Kampf, itself a propaganda tool, to the study and practice of propaganda. He claimed to have learned the value of propaganda as a World War I infantryman exposed to very effective British and ineffectual German propaganda. The argument that Germany lost the war largely because of British propaganda efforts, expounded at length in Mein Kampf, reflected then-common German nationalist claims. Although untrue—German propaganda during World War I was mostly more advanced than that of the British—it became the official truth of Nazi Germany thanks to its reception by Hitler.

Mein Kampf contains the blueprint of later Nazi propaganda efforts. Assessing his audience, Hitler writes in chapter VI:

Propaganda must always address itself to the broad masses of the people. (...) All propaganda must be presented in a popular form and must fix its intellectual level so as not to be above the heads of the least intellectual of those to whom it is directed. (...) The art of propaganda consists precisely in being able to awaken the imagination of the public through an appeal to their feelings, in finding the appropriate psychological form that will arrest the attention and appeal to the hearts of the national masses. The broad masses of the people are not made up of diplomats or professors of public jurisprudence nor simply of persons who are able to form reasoned judgment in given cases, but a vacillating crowd of human children who are constantly wavering between one idea and another. (...) The great majority of a nation is so feminine in its character and outlook that its thought and conduct are ruled by sentiment rather than by sober reasoning. This sentiment, however, is not complex, but simple and consistent. It is not highly differentiated, but has only the negative and positive notions of love and hatred, right and wrong, truth and falsehood.