German sociologist Ulrich Beck has described ‘cosmopolitanisation’ as the sociological face of globalisation and has advocated for a cosmopolitan sociology. The turn to the cosmopolitan he suggested involves an epistemic shift within the discipline. It demands a move away from a sociology dominated by methodological nationalism to one whose focus is not so much on the external, ‘out there’ processes of globalisation, but on the internalised global practices reflected within societies. This article employs such a cosmopolitan lens to explore the changing nature of old age/later life. We highlight a number of domains where Beck’s elaboration of cosmopolitanisation may be actualised in later life. These include: (a) the ‘assetisation’ of later life; (b) the transgenerational expansion of information and communications technology; (c) the experience of transnational ageing; (d) the development and promotion of transnational policies for a senior citizenry; and (e) the impact of global climate change. We conclude by noting how Beck’s desire to shift sociology from its traditional base in methodological nationalism to what he termed a more cosmopolitan sociology can apply equally to analysis of the changing character of later life. In seeking to apply and extend Beck’s concept of cosmopolitanisation to the sociological study of later life, we hope to enrich and enliven a new sociology of later life; our article aims to make such a start.