During this time of ecological crisis, spiritual guides are needed to provide inspiration and impel action. In the Roman Catholic tradition, saints act as role models and are associated with particular causes, locations, or professions. Who, then, are the ecological saints, whose witness can inspire hope and action in support of the environment? This article explores that question in two ways. First the writings and accounts of saints who are traditionally connected to the environment are examined to produce six indicators (...) of the beliefs, characteristics, and actions of ecological saints. Second, a green gaze is applied to Saint Marguerite Bourgeoys, a seventeenth‐century educator who lived in what would become Montreal, Canada, by comparing her writings and accounts of her life to the six indicators of an ecological saint. Identifying more ecological saints can promote environmental responsibility, and the six indicators of an ecological saint can be the lens through which beloved saints are re‐examined. (shrink)