The concept of transnationalism, despite a variety of earlier uses, has recently been used to describe the sociological phenomenon of cross-border migrants considering more than one place our home. This can be in terms of identity and belonging, cultural expression, family and other social ties, visits, financial flows, organizing working life in more than one nation-state or transnational political projects. In this paper I discuss the theory and practice of transnationalism to assess the practical, explanatory and normative strength of the concept; I then introduce three different forms of cosmopolitan approaches and assess whether transnational migrants practices contribute to a cosmopolitan outlook and active global citizenship. I show...