The Holocaust in Greece was the mass murder of Greek Jews, mostly as a result of their deportation to Auschwitz concentration camp, during World War II. By 1945, between 82 and 92 percent of Greek Jews had been murdered, one of the highest proportions in Europe.
Before the war, approximately 72,000 to 77,000 Jews lived in 27 communities in Greece. The majority, about 50,000, lived in Salonica (Thessaloniki), a former Ottoman city captured and annexed by Greece in 1912. Most Greek Jews were Judeo-Spanish-speaking Sephardim (Jews originating on the Iberian Peninsula) with some being Greek-speaking Romaniotes (an ancient Jewish community native to Greece). Germany, Italy, and Bulgaria invaded and occupied Greece in April 1941. During the first year of the occupation, Greek Jews as well as Christians suffered from famine, property confiscation, and hostage killings.
In March 1943, just over 4,000 Jews were deported from the Bulgarian occupation zone to Treblinka extermination camp. From 15 March through August, almost all of Salonica's Jews, along with those of neighboring communities in the German occupation zone, were deported to Auschwitz concentration camp. After the Italian armistice in September 1943, Germany took over the Italian occupation zone, whose rulers had until then opposed the deportation of Jews. In March 1944, Athens, Ioannina, and other places in the former Italian occupation zone witnessed the roundup and deportation of their Jewish communities, although more Jews were able to escape than in the earlier deportations. In mid-1944, Jews living in the Greek islands were targeted. Around 10,000 Jews survived the Holocaust either by going into hiding, fighting with the Greek resistance, or surviving Nazi concentration camps.
Following World War II, surviving Jews faced obstacles regaining their property from non-Jews who had taken it over during the war. About half emigrated to Israel and other countries in the first decade after the war. The Holocaust was long overshadowed by other events during the wartime occupation, but gained additional prominence in the 21st century.