previous systematic reviews have revealed that adolescents' unmet need for contraception can vary from one study to another. Problems of access to and use of contraception in adolescents and youth occur in many developing countries. This article aimed to explore and identify barriers faced by adolescents and youth of developing countries in accessing and using contraception. Systematic searches were performed in seven databases: PubMed, ScienceDirect, EBSCO, Scopus, the Cochrane Library, Sage Journals, and Google Scholar, in the range of January 2011 to December 2022. A total of twenty-six articles were selected for further investigation. All articles cover nineteen quantitative and seven qualitative studies addressing barriers adolescents and youth from developing countries face in accessing and using contraception. Data were tabulated in Microsoft Excel spreadsheets. Furthermore, the data were presented descriptively. This review revealed that adolescents and youth in developing countries face the same barriers to meeting contraceptive needs. Specific interventions are required to resolve the unmet need for contraception in adolescents and youth through the health programs.