In the past three years, tropical forested countries across the world have taken important institutional, policy, legal and piloting steps to become ready for REDD+. Capacity building is a key component of this REDD+ readiness process, which is backed by investments from a large number of organisations, government agencies, communities and individuals. This country report provides a regional assessment of organisations providing REDD+ capacity building in Cambodia. The main objectives of the assessment were to: identify and map the service providers involved in REDD+ capacity building; identify the main objectives, competencies and type of services being offered by a shortlist of eight leading service providers, their target audiences and key achievements; identify the gaps in capacity building service provision between what is needed most and what is actually being delivered; on the basis of these gaps provide recommendations for strengthening and coordinating actions.