We use data from the Swedish Financial Supervisory 2010 consumer survey to look at levels of financial literacy and retirement planning in the Swedish population. The results indicate that many adults have low financial literacy. In general, financial literacy levels are lower among the young, the old, women and those with low income or low educational attainment. People who report having tried to plan for retirement have higher levels of financial literacy. In particular, an understanding of risk diversification is strongly correlated with planning for retirement. We relate our findings to features of the Swedish pension system.