Blu Greenberg (born January 21, 1936, in Seattle, with the name Bluma Genauer, later legally changing her first name to Blu^[1][2]) is an American writer specializing in modern Judaism and women's issues. Her most noted books are On Women and Judaism: A View from Tradition (1981), and Black Bread: Poems, After the Holocaust (1994).

She has a B.A. in political science from Brooklyn College,^[3] an MA in clinical psychology from the City University of New York, and an MS in Jewish history from Yeshiva University.^[4] She is married to Irving Greenberg,^[5] who is also a well-known author and professor.

Greenberg has worked to bridge Orthodox Judaism and feminism.^[2] In February 1973, she gave the opening address at the first National Jewish Women's Conference, which was held in New York City.^[6] In 1997 and 1998, she chaired the first and second International Conference on Feminism and Orthodoxy, and she is the founder and the first president of the Jewish Orthodox Feminist Alliance. She has also tried to build bridges between women of different faiths by helping to set up "Women of Faith", and by her involvement in the "Dialogue Project", which seeks to unite Jewish and Palestinian women. She has lectured at universities and to Jewish communities in the United States and elsewhere.^[5] She also created the famous saying, "Where there's a rabbinic will, there's a halakhic way."^[7]

She received the Woman Who Made A Difference award on January 26, 2000, from the American Jewish Congress Commission for Women's Equality during a ceremony at the Israeli Knesset in Jerusalem.^[8]

Blu Greenberg's papers and her audiovisual collection are held at the Arthur and Elizabeth Schlesinger Library on the History of Women in America, a research library at the Radcliffe Institute for Advanced Study, Harvard University.^[9][10]