Helmut Rauca (3 November 1908 – 29 October 1983) was the Holocaust perpetrator instrumental in the murder of more than 10,000 Jews from the Kaunas Ghetto, Lithuania, during World War II.
He was a member of Einsatzgruppe A in the rank of Hauptscharführer (master sergeant).
As the Gestapo Jewish Affairs Specialist, Rauca was responsible for the selection of about one-third of the Ghetto inmates including men, women, and children, to be killed during the Große Aktion known as the Kaunas massacre of October 29, 1941 perpetrated at the remote Ninth Fort on the outskirts of Kaunas.After the war, Rauca emigrated to Canada legally in 1950.
He had become a Canadian citizen in 1956 under his own name and embarked on a successful business career.
At the age of seventy-three, he was charged by the Canadian authorities with aiding and abetting in the murder of 10,500 persons forty-three years earlier, in Kaunas.