Health literacy is known to influence health. Findings on the unequal distribution of health literacy among less well-educated young people are presented. The influence of socio-demographic factors and the consequences of a low level of health literacy with regard to health-related behaviour are discussed. Data from a survey on the health literacy of young people with a lower level of education, older people and migrants (n = 1,000) were used. Health literacy was measured using the instruments of the European Health Literacy Survey (HLS-EU-Q47). The results demonstrate a lower level of health literacy among young people with less education and especially among young migrants. Explanations for a lower level of health literacy among young people with less well-educated young people were parents' educational background and parents' wealth. Migration-related factors had no influence on young people. Further correlations between health literacy and health behaviour were explored. It is concluded that health literacy is linked to health behaviour and that unequal distributions of health literacy among young people may increase health inequalities.