In this paper, we examine the potential for developing a stronger connection between the two significant discourses of sustainable development and nationalism. While there has been limited academic enquiry into the relationships that might exist between these two discourses, we draw on the case study of Wales since 1999 to show how policy-makers are increasingly examining the potential for promoting a more fruitful dialogue between them. We examine how nationalist discourses in Wales have led to the development of a form of sustainable development that is allegedly more attuned to Welsh national values and identities. We also show how sustainable development is being used to imagine new and possibly more inclusive kinds of futures for the Welsh nation. We conclude by reaffirming the fruitful synergies that might exist between sustainable development and nationalism while acknowledging the tensions that arise in seeking to make connections between them.