Resumen: This article examines the phenomenon of transnationalism among retired immigrants living in border areas of northern Mexico. Using in-depth interviews conducted with US retirees residing in Baja California, Mexico, we seek to examine how transnational aging is constructed through different practices, relationships, networks and exchanges between both cultures and countries. We analyse several analytical dimensions of transnationalism including social, economic, cultural, identity and belonging conditions. In particular, networks and exchanges among these elderly migrants are most frequently constructed across social and family networks, economic transfers, access to healthcare, and culture. Additionally, we find that these maintained transnational practices in northern Mexico parallel those of international retired migrants living in other parts of the world. However, we argue that the proximity to the US border enables and encourages many types of connections of varying intensities. Finally, we discuss the implications for future research linking transnationalism with international retirement migration. Idioma: Inglés DOI: 10.1080/1369183X.2015.1086632 Año: 2016 Publicado en: JOURNAL OF ETHNIC AND MIGRATION STUDIES 42, 5 (2016), 816-833 ISSN: 1369-183X Factor impacto JCR: 1.362 (2016) Categ. JCR: ETHNIC STUDIES rank: 4 / 15 = 0.267 (2016) - Q2 - T1 Categ. JCR: DEMOGRAPHY rank: 11 / 26 = 0.423 (2016) - Q2 - T2 Factor impacto SCIMAGO: 1.399 - Demography (Q1) - Arts and Humanities (miscellaneous) (Q1)