Against the backdrop of debates about migrant integration in Western countries, this article examines the extent to which liberal democratic values differ between migrants and non-migrants in Europe and whether potential differences can be explained by socialisation in different political contexts. We measure specific values of liberal democracies using data from the European Social Survey, covering a large number of countries, and from the German Integration Barometer, covering a representative sample of migrants from different countries of origin. This allows us to investigate how structural political socialisation and indoctrination in more or less democratic regimes affect the democratic values of migrants and to what extent possible differences in values diminish when migrants from non-democratic countries settle in democratic countries. The analyses show that all three – non-migrants, migrants from more democratic countries, and migrants from less democratic countries – have high levels of liberal democratic values. At this elevated level, we additionally observe that longer periods of socialisation in less democratic countries of origin reduce, and longer periods in more democratic countries of destination increase, migrants’ support for liberal democratic values. Thus, we find support for socialisation and adaptation processes among immigrants in Europe, but these effects are relatively small.