How does intergenerational social mobility affect the political incorporation of second-generation migrants? The enhanced political participation of second-generation immigrants is often linked to assimilation processes and an improved socio-economic standing compared to their first-generation parents. However, the specific effects of intergenerational social mobility on political engagement, as well as the mechanisms driving this relationship, remain underexplored. In this paper, we argue that upward social mobility enhances the sense of belonging in the host society, which in turn positively affects political participation. Simultaneously, we expect that the local opportunity structure plays an essential role in facilitating upward mobility. Utilising household panel data and linking parents and children, we examine the connection between intergenerational social mobility and political engagement among second-generation migrants in the UK. The results of this study hold important implications for our understanding of political participation of the population with a migration background, while also highlighting the role of local structures shaping these outcomes in diverse ways.