Recent systematic reviews have highlighted a paucity of rigorous evidence to guide water, sanitation and hygiene(WASH) interventions in humanitarian crises. In June 2017, the Research for Health in Humanitarian Crises (R2HC)programme of Elrha, convened a meeting of representatives from international response agencies, research institutionsand donor organisations active in the field of humanitarian WASH to identify research priorities, discuss challengesconducting research and to establish next steps. Topics including cholera transmission, menstrual hygiene management,and acute undernutrition were identified as research priorities. Several international response agencies have existingresearch programmes; however, a more cohesive and coordinated effort in the WASH sector would likely advance thisfield of research. This report shares the conclusions of that meeting and proposes a research agenda with the aim ofstrengthening humanitarian WASH policy and practice.