This article explores the role of religion in local energy transition processes. By combining insights from (a) sustainability studies and (b) academic contributions on religion and sustainability, a theoretical approach for describing the role of religion in local energy transitions is developed. Religion is conceived of as a subsystem among other local subsystems that potentially contribute via their competences to energy transition processes. Three potential functions of religion are identified: (1) Campaigning and intermediation in the public sphere; (2) “Materialization” of transitions in the form of participation in projects related to sustainable transitions; and (3) Dissemination of values and worldviews that empower environmental attitudes and action. These functions are studied in the case of the energy transition in Emden, a city in North-Western Germany. Although religion attends, to some degree, each of the three functions, it does not assume a dominant role relative to other local subsystems. Actors from other social subsystems appear to overtake these functions in a more efficient way. As such, in a highly environmentally active region, there are few indications for a specific function of religion. These results shed a critical light on the previously held assumption that religion has a crucial impact on sustainability transitions
