Phyllis Stewart Schlafly (; born Phyllis McAlpin Stewart; August 15, 1924 – September 5, 2016) was an American attorney, conservative activist, and anti-feminist, who was nationally prominent in conservatism. She held paleoconservative social and political views, opposed feminism, gay rights, and abortion, and campaigned against ratification of the Equal Rights Amendment to the U.S. Constitution.

More than three million copies of her self-published book A Choice Not an Echo (1964), a polemic in support of Republican candidate Barry Goldwater and condemning more liberal East Coast Republicans personified by Nelson Rockefeller, were sold or distributed for free. Schlafly co-authored books on national defense, and was critical of arms control agreements with the Soviet Union. In 1972, Schlafly founded the Eagle Forum, a conservative political interest group, and remained its chairwoman and CEO until her death in 2016, while staying active in conservative causes.