In this article, I use the French Trajectories and Origins survey to describe patterns and trends of cross‐border ties across immigrant generations. Transnational activities are measured through a wide range of cross‐border ties, grouped into three dimensions: sociopolitical, economic, and a third dimension that I call re‐migration. Three sets of determinants are taken into account: variables measuring exposure to the country of origin, variables describing incorporation in the host country, and variables that are specific to each generation. Conversely to the straight‐line assimilation paradigm, the findings put the analytical power of the generational variable into perspective by (1) highlighting the wide variability of transnationalism within each generation and (2) measuring distinct intergenerational trends along different types of cross‐border engagement. A thorough investigation of the sources of within‐generation heterogeneity emphasizes the explanatory power of state‐level, religious, and ethnoracial variables.