Raoul Gustaf Wallenberg (4 August 1912 – disappeared 17 January 1945) was a Swedish architect, businessman, diplomat, and humanitarian. He saved thousands of Jews in German-occupied Hungary during the Holocaust from German Nazis and Hungarian fascists during the later stages of World War II. While serving as Sweden's special envoy in Budapest between July and December 1944, Wallenberg issued protective passports and sheltered Jews in buildings he declared as Swedish territory.

On 17 January 1945, during the Siege of Budapest by the Red Army, Wallenberg was detained by SMERSH on suspicion of espionage and subsequently disappeared. In 1957, 12 years after his disappearance, he was reported by Soviet authorities to have died of a suspected myocardial infarction on 17 July 1947 while imprisoned in the Lubyanka, the prison at the headquarters of the NKVD secret police in Moscow. However, the cause and date of death have been disputed ever since, with some people claiming to have encountered men matching Wallenberg's description until the 1980s in Soviet prisons and psychiatric hospitals. The motives behind Wallenberg's arrest and imprisonment by the Soviet government, along with questions surrounding the circumstances of his death and his ties to US intelligence, remain shrouded in mystery and are the subject of continued speculation. In 2016, the Swedish Tax Agency declared him dead in absentia, with the pro forma date of death noted as 31 July 1952.

As a result of his successful efforts to rescue Hungarian Jews, Wallenberg has been the subject of numerous humanitarian honours in the decades following his presumed death. In 1981, US Congressman Tom Lantos, one of those saved by Wallenberg, sponsored a bill making Wallenberg an honorary citizen of the United States, the second person ever to receive this honour. Wallenberg is also an honorary citizen of Canada, Hungary, Australia, United Kingdom and Israel. Israel has designated Wallenberg one of the Righteous Among the Nations. Numerous monuments have been dedicated to him, and streets have been named after him throughout the world. The Raoul Wallenberg Committee of the United States was created in 1981 to "perpetuate the humanitarian ideals and the nonviolent courage of Raoul Wallenberg." It gives the Raoul Wallenberg Award annually to recognize persons who carry out those goals. He was awarded a Congressional Gold Medal by the United States Congress "in recognition of his achievements and heroic actions during the Holocaust." Declassified documents have confirmed that Raoul Wallenberg was working with the Office of Strategic Services (OSS), the predecessor of the CIA.

Although some have claimed that Wallenberg was responsible for rescuing 100,000 Jews who survived the Holocaust in Hungary, historians consider that figure to be an exaggeration, and the actual number of people rescued to be in the range of 4,500 individuals, according to Yad Vashem.