Barbara Brown Zikmund (sometimes known as BBZ) (born 1939) is an American historian of religion.
Much of her research has focused on the role in American religious life played by ordained women; other of her work has been done on the history of the United Church of Christ.
As a facilitator of interfaith relations, Zikmund was a member of the Interfaith Relations Committee of the National Council of Churches, in which role she served from 1991 until 2007; seven of those years, she spent as chair of the committee.
From 1981, she was academic dean at the Pacific School of Religion; from the latter year until 2000, she was president of Hartford Seminary.
Later in her career Zikmund taught in Japan; she has also been a visiting scholar at the Catholic University of America and at Wesley Theological Seminary.