Underground media in German-occupied Europe refers to various kinds of clandestine media which emerged under German occupation during World War II. By 1942, Nazi Germany occupied much of continental Europe. The widespread German occupation saw the fall of public media systems in Northern France, Belgium, Poland, Norway, Czechoslovakia, Northern Greece, and the Netherlands. All press systems were put under the ultimate control of Joseph Goebbels, the German Minister of Propaganda.
Without control of the media, occupied populations began to create and publish their own uncensored newspapers, books and political pamphlets. The underground press played a "crucial role" in informing and motivating resistance across the continent and building solidarity. They also created an "intellectual battlefield" in which ideas like post-war reconstruction could be discussed. Underground forms of media allowed for information sharing among the oppressed, helping them build solidarity, strengthen morale and, in some cases, stage uprisings.
An important underground press emerged from the Belgian Resistance in German-occupied Belgium soon after the defeat in May 1940. Eight underground newspapers had appeared by October 1940 alone. Much of the resistance's press focused around producing newspapers in both French and Dutch languages as alternatives to collaborationist newspapers like Le Soir. At its peak, the clandestine newspaper La Libre Belgique, a title which had first appeared under German occupation in World War I, was relaying news within five to six days; faster than the BBC's French-language radio broadcasts, whose coverage lagged several months behind events. Copies of the underground newspapers were distributed anonymously, with some pushed into letterboxes or sent by post.