Anthony Sawoniuk, formerly Andrei Andreeovich Sawoniuk (Belarusian: ?????? ???????; 7 March 1921 – 6 November 2005) was a Belarusian Nazi collaborator from the town of Domaczewo in interwar Poland.
After taking part in the murder of the Jewish community in his home town, Sawoniuk served in the SS until November 1944 when he defected to the Polish II Corps in the British Eighth Army.
After the war, he settled in Britain, became a British citizen, and became the first and only person to be convicted under the UK's War Crimes Act 1991, when he was found guilty of war crimes in 1999.