1) Participatory integrated water resource management (IWRM) planning workshops were held in six small island developing states (SIDS) to plan demonstration projects focusing on sustainable groundwater and water resource management. 2) The workshops brought together stakeholders from different sectors and levels of government and empowered them to actively participate in planning and implementation. 3) A key lesson was that a coordinated cross-sectoral approach is needed to address vulnerable groundwater resources in SIDS, and capacity building on IWRM principles is also essential.