This article is the introduction to the Thematic Series Use and consequences of family policies among migrants and their descendants in Europe. The study contexts are countries in different Western European regions: Belgium, France, Germany, and Italy. Despite their differences with respect to welfare-state types in general and family policies in particular, these countries also vary when it comes to their immigration histories and current migrant populations. Yet, the fast-growing field of research on the effects of family polices on family and fertility behavior as well as work-family reconciliation has virtually overlooked migrants. To address this void in the existing literature, this Thematic Series raises two research questions: To what degree do family policies include, and are used by, migrants and their descendants? And, to what extent do such polices promote migrants’ integration into European societies? The collection contains six empirical articles investigating either eligibility or use and consequences of two specific family policy measures: parental leave and external childcare. Collectively, the studies show significant disadvantages among migrant groups in eligibility for family policy measures, and consequently in their use and impacts on further life-course patterns, compared to majority populations. They also demonstrate diverging patterns within migrant populations.