This report presents the integrated case study for Bangladesh carried out under an OECD project on Development and Climate Change. The report is structured around a three-tiered framework. First, recent climate trends and climate change scenarios for Bangladesh are assessed and key sectoral impacts are identified and ranked along multiple indicators to establish priorities for adaptation. Second, donor portfolios in Bangladesh are analyzed to examine the proportion of development assistance activities affected by climate risks. A desk analysis of donor strategies and project documents as well as national plans is conducted to assess the degree of attention to climate change concerns in development planning and assistance. Third, an in-depth analysis is conducted for coastal zones, particularly the coastal mangroves – the Sundarbans – which have been identified as particularly vulnerable to climate change. There are also some examples of development policies and priorities in Bangladesh that might potentially conflict with climate change responses. The Bangladesh case study also highlights the importance of the trans-boundary dimension in addressing climate change adaptation. climate change risks should also not distract from aggressively addressing other critical threats, including shrimp farming, illegal felling of trees, poaching of wildlife, and oil pollution from barge traffic, that might already critically threaten the fragile ecosystems such as the Sundarbans even before significant climate change impacts manifest themselves.