The vulnerability assessment of Sihanoukville, Cambodia, is the result of an in-depth national and local literature and data review, interviews and discussions with an extensive range of local government stakeholders and a community-focused participatory assessment. It considers existing vulnerabilities, municipal plans and priorities and assesses how climate change will affect these.Initial recommendations focus on the integration of climate change into the coastal-urban master plan. In particular, improving basic services such as storm water drainage and solid waste management are priority areas. Early warning systems and disaster preparedness, coastal zone protection and livelihood strategies for the most vulnerable groups are other priorities.