Migration is a complex, ongoing process that is closely linked with ageing. Older individuals might grow old in their country of origin while their children live abroad, age-in-place in host countries while negotiating issues of belongingness and welfare access, or even migrate in later life to be closer to family. In all these scenarios, ageing and migration are interconnected and influence each other. Understanding this relationship helps us see how mobility structures affect the experience of ageing, and how ageing can also redefine migration. With this, the book offers a relevant and in-depth exploration of how ageing and migration are interconnected processes. This edited book addresses the following questions: How is care negotiated and managed across borders within families? What does it mean to age successfully in transnational contexts, and how do migrants negotiate belonging and well-being? How do mobility patterns, particularly return migration, reshape later life and intergenerational relationships? This volume argues that ageing in migrant and transnational families is not peripheral but central to the study of contemporary societies. By approaching ageing as a process of navigation rather than decline, this book advances a critical perspective for understanding kinship, care, and belonging in an interconnected and ageing world.