Allen James Reimer (August 10, 1942 – August 28, 2010) was a Canadian Mennonite theologian who held a dual academic appointment as Professor of Religious Studies and Christian Theology at Conrad Grebel University College, a member college of the University of Waterloo, and at the Toronto School of Theology, a consortium of divinity schools federated with the University of Toronto. At the University of Waterloo's fall 2008 convocation, he was named Distinguished Professor Emeritus, an honor seldom bestowed on retired faculty.