This joint UNICEF-UNHCR guidance note aims to identify and outline opportunities and recommendations to responsibly improve the identification of quality and disaggregated data on refugee and other forcibly displaced children, within data systems in both agencies and in national data systems. The note brings together international recommendations and guidance on data disaggregation with policies and standards on personal and non-personal data protection and responsible data management, highlighting practical tools that can be used for responsible data disaggregation.