The Bangladesh-based Environment and Social Development Organization (ESDO) has completed a comprehensive initial assessment of mercury sources and products containing mercury in Bangladesh to contribute to national inventory development and further the initiatives towards national ratification of the Mercury Treaty. This activity includes data gained through in-field interviews with major stakeholders in the manufacturing, industrial, health and commercial sectors as well as desktop analysis of available literature. The result is a detailed and insightful account of the major sources of mercury releases in Bangladesh and quantification estimates for many of those sectors where data was available through interviews, databases and existing literature. This IMEAP project is relevant to Articles 4, 5, 8, 9, 11, 16, 17, 18 and 19 of the Mercury Treaty.