Abstract The burden of non-communicable diseases is a growing public health crisis that requires immediate action. As health literacy (HL) has been strongly linked with health behaviours and health outcomes, it has many potential implications for health care and health education. Although recent research has emphasised the importance of developing HL early in life, much of the research has focused on understanding and improving HL in adult populations. As young people socialise in different contexts and are exposed to different health-related situations, they require different HL competencies. As part of a wider project, this study aims to gather the perceptions of international academics and community-based practitioners on the concept and importance of HL in and for young people. Specifically, the study aims to (i) explore current understandings of the concept of HL in young people; (ii) examine the importance of HL for young people; (iii) identify those at risk of having low levels of HL; and (iv) determine the specific health behaviours that young people are currently struggling with. A stakeholder mapping exercise was used to recruit academic and community-based practitioners to take part in a one-to-one interview (n = 29). Reflexive thematic analysis was used to analyse the data. The preliminary findings suggest that HL is a very broad yet individualised concept that is critical to develop at an early age given the difficulty young people face in adopting healthy behaviours in their social and physical environment. Furthermore, the participants highlighted that minority groups, such as members of the travelling community and refugees, and those from low socioeconomic populations, are at greatest risk of low HL. Finally, the health issues that appeared to be of most concern in young people were vaping, social media use and poor mental health. These findings can be used to inform appropriate interventions and policies to target the HL of young people. Key messages • Health literacy is a very, yet individualised, concept that is critical to develop given the difficulty young people face in adopting healthy behaviours in their social and physical environment. • Minority groups, such as members of the travelling community, refugees, and those from low socioeconomic populations are at greatest risk of low levels of health literacy.