The presentation reviewed Cambodia’s progress in assessing and vaccinating out‑of‑school (OOS) girls against HPV. While an official OOS assessment has been delayed, CHAI and NIP estimate numbers using census, school enrollment, and community‑level data with support from local authorities. Key challenges include limited denominators, underused data sources, weak coordination, mobile populations, and budget constraints. High overall coverage (93%) is achieved mainly through school‑based vaccination, supplemented by health facilities and outreach. Future priorities focus on completing OOS assessments, improving planning, enhancing data quality, and expanding year‑round access with strong local collaboration.