Duncan Baillie Forrester (10 November 1933 – 29 November 2016) was a Scottish theologian and the founder of the Centre for Theology and Public Issues at New College, University of Edinburgh. He was latterly honorary fellow and professor emeritus at New College.
Forrester was born in Edinburgh in 1933. His writings are contributions to Christian ethics, missiology, practical theology, and political and public theology. During the 1970s his writings focused on Protestant missions in India. After founding the Centre for Theology and Public Issues (CTPI) in 1984, his work increasingly emphasized the intersection between theology and politics, with special reference to Scotland, the United Kingdom, and Europe. He stepped down from the directorship of CTPI in 2000. He also published historical studies of Christian worship in Scotland.
He died on 29 November 2016 at the age of 83.