Mary Anne Warren is an American writer and philosophy professor. She is noted for her writings on the issue of abortion. Frequently her essays are required readings in academic courses dealing with the abortion debate and they are frequently cited in major publications like Peter Singer's The Moral of the Story: An Anthology of Ethics Through Literature and Bernard Gert's Bioethics: A Systematic Approach . She is sometimes described as a feminist, largely due to her ethicist writings being pro-choice.
For many years Warren was a professor of philosophy at San Francisco State University.