Background Australia does not have a national strategy for Aboriginal and Torres Strait Islander adolescent health and as a result, policy and programming actions are fragmented and may not be responsive to needs. Efforts to date have also rarely engaged Aboriginal and Torres Strait Islander people in co-designing solutions. The Roadmap Project aims to work in partnership with young people to define priority areas of health and well-being need and establish the corresponding developmentally appropriate, evidence-based actions.

Methods and analysis All aspects of this project are governed by a group of Aboriginal and Torres Strait Islander young people. Needs, determinants and corresponding responses will be explored with Aboriginal and Torres Strait Islander adolescents (aged 10–24 years) across Australia through an online qualitative survey, interviews and focus group discussions. Parents, service providers and policy makers (stakeholders) will share their perspectives on needs and support required through interviews. Data generated will be co-analysed with the governance group and integrated with population health data, policy frameworks and evidence of effective programmes (established through reviews) to define responsive and effective actions for Aboriginal and Torres Strait Islander adolescent health and well-being.

Ethics and dissemination Ethical approval for this study has been obtained from the Aboriginal Health Council of South Australia (Ref: 04-21-956), the Aboriginal Health and Medical Research Council of New South Wales (Ref: 1918/22), the Western Australian Aboriginal Health Ethics Committee (Ref: HREC1147), the Northern Territory Health and Menzies School of Health Research (Ref: 2022–4371), ACT Health Human Research Ethics Committee (Ref: 2022.ETH.00133), the St. Vincent’s Hospital, Victoria (Ref: HREC 129/22), University of Tasmania (Ref: 28020), Far North Queensland Human Research Ethics Committee (Ref: HREC/2023/QCH/89911) and Griffith University (Ref: 2023/135). Prospective adolescent participants will provide their own consent for the online survey (aged 13–24 years) and, interviews or focus group discussions (aged 15–24 years); with parental consent and adolescent assent required for younger adolescents (aged 10–14 years) participating in interviews.

Study findings (priority needs and evidence-based responses) will be presented at a series of co-design workshops with adolescents and stakeholders from relevant sectors. We will also communicate findings through reports, multimedia clips and peer-reviewed publications as directed by the governance group.