Isaiah Trunk (Polish: Izajasz Trunk; 1905 – 1981), was a chief archivist of the Yiddish Scientific Institute YIVO in New York from Warsaw, and the leading historian on the Holocaust. Trunk was an expert on Jewish history during the Nazi occupation of Poland. A scholar and author originally from Poland, he was the winner of a National Book Award in history for his monograph titled Judenrat: The Jewish Councils in Eastern Europe Under Nazi Occupation published in New York by Macmillan in 1972.