Earlier research in Norway indicates that political socialization in the home not only matters for young people's future civic participation, but also for their educational ambition. This study assesses if this also may be true internationally and for socio-culturally diverse countries. It analyzes large-scale nationally representative samples of 8th grade students in 38 countries that in 2009 took part in IEA's International Civic and Citizenship Education Study (ICCS 2009). Indicators of political socialization are how often students report that they talk with parents about "political and social issues", and the students' ratings of their parents' interest in such issues. Their relationship with educational ambition is examined with controls for educational achievement (test scores) and socio-economic family status.