Avigdor HaKohen Miller (August 28, 1908 – April 20, 2001) was an American Haredi rabbi, author, and lecturer most prominently known for instigating and invigorating extreme right-wing politics in American Orthodox Jewry. He served simultaneously as a communal rabbi, mashgiach ruchani (spiritual supervisor) of Yeshiva Rabbi Chaim Berlin, and as a teacher in Beis Yaakov. After his son opened Yeshiva Beis Yisrael in 1986, Miller served as its rosh yeshiva (dean).