This study gauges Finnish people’s knowledge about pensions and their trust in the pension system. A further aim is to see if knowledge and trust are related and to explore the role of sociodemographic factors in that relationship. We examine both self-assessed and objective knowledge of pension system details and look at how age, gender, education, income, and socioeconomic status are reflected in pension knowledge and trust. The results reveal that the relationship between pension knowledge and trust is driven by sociodemographic factors. However, for those with a primary education, there is a positive association between pension knowledge and trust.