The constant decline of political trust has been shown in political sociology. Young people in particular seem to display lower levels of political trust, which is a challenge for the sustainability of democracy. Still, these levels of political trust among youth differ greatly from one country to another. This article therefore seeks to answer the following question: How can we account for cross‐national diversity with regard to young people’s political trust? To answer this question, I performed multilevel analyses based on data from the European Social Survey. I show in the article that cross‐national diversity stems from the institutional arrangements that structure entry into adulthood, i.e., what I call ‘youth welfare citizenship regimes’: The more inclusive is the youth economic citizenship and the more individualised is their social citizenship, the higher is young people’s political trust – which could buffer the decline in political trust.