This article argues that functional secularism frames the discourse of contemporary humanitarianism. While in principal ‘neutral’ to religion, in practice this framing serves to marginalize religious language, practice and experience in both the global and local conceptualization of humanitarian action. Illustrated with examples from a range of humanitarian contexts, it is argued that the resulting discourse fosters a humanitarian response that is ill-equipped to engage with dynamics of faith within displaced populations. Humanitarianism needs to acknowledge the advent of post-secularism signalled by many social theorists, and engage with greater awareness of the role of faith—both liberal materialist and religious—in addressing a range of issues of core relevance to the field: the clarification of core humanitarian values, the retention of a human rights framework able to define and protect human dignity, and appropriate means of addressing religious experience and well-being in the course of humanitarian programming.