Cambodia is taking steps towards developing a series of marine protected areas to combat increased environ-mental degradation. The Koh Sdach Archipelago has been highlighted to become the country’s second large marine protected area, and management plans are being developed through collaborations between local commu-nities and national and international conservation organisations. Prior to the implementation of any management programme, however, an up-to-date baseline analysis of the environmental status of the area is helpful, and will allow the development of appropriate site-specific management strategies. This study used a modified form of the Reef Check survey protocol. Results indicated that the coral reefs found throughout the Koh Sdach Archipelago are in good condition, but with some evidence of ecological degradation. Conservation efforts are recommended as a means of preventing future degradation, and encouraging long-term stability within the ecosystem.