The handbook is intended to be used by country, regional and global teams in the United Nations system, but it can also provide insights and guidance to field practitioners beyond the United Nations, including other international or regional organizations, national counterparts, youth-led and youth focused organizations, movements and networks, and peacebuilding organizations. The programming handbook builds on recent evidence and increasing momentum to prioritize youth-inclusive and youth-sensitive peace and security programming, as a core element of more sustainable and long-lasting peacebuilding efforts. It follows the interagency Guiding Principles on Young People’s Participation in Peacebuilding1 and expands on the promising practices and limitations that the subsequent Practice Note on Young People’s Participation in Peacebuilding2 identifies. The findings and recommendations from The Missing Peace: Independent Progress Study on Youth, Peace and Security3 also serve as a basis to guide youth-led and youth-focused peacebuilding programming. In addition, the handbook builds on a review of existing guidelines4 and lessons learned from previous youth-focused peacebuilding efforts, both by the United Nations system and by partner organizations. The objective of the handbook is therefore to complement existing guidance by filling the gaps and responding