Background: Refugees are particularly vulnerable to the negative consequences of the pandemic due to pre-existing challenges, but the impact of the pandemic on this group remains to be understood. In this study, we aimed to uncover the effects of the Covid-19 pandemic on the mental health of Palestine refugees in Gaza, disentangling the role of social determinants. We further aimed to explore views on the effectiveness and acceptability of policies and strategies the United Nations Relief and Works Agency for Palestine Refugees in the Near East (UNRWA) implemented during the pandemic.Methods: This qualitative study took place between August and November 2020. Twenty-nine key-informant interviews were conducted with UNRWA Headquarters, Gaza Field Office, Health and Relief and Social Service staff and with community leaders and members residing in Rafah and Jabalia camps. We collected information on UNRWA’s strategies, people’s perception of those strategies, and personal and professional stressors during the pandemic. Data was coded based on the framework for social determinant of mental health. Results: Interview data suggest that the pandemic and social determinants mutually aggravated one another resulting in a major impact on the physical and mental health of Gazans. Women, children and daily-paid workers were acutely more disadvantaged than other groups of the community, experiencing violence and anxieties. Financial strain, violence, food insecurity, and disruption in the education process were reported by all participants. UNRWA reconfigured its methods of service delivery to continue the provision of essential services. The strategies enacted by UNRWA during the pandemic were generally perceived as helpful, yet not enough to respond to Gazans’ needs.Conclusion: The pandemic serves as a stark reminder of the need to broaden the public health response beyond disease management and prevention to address social determinants in order to improve refugees’ health and decrease their vulnerability to future shocks. UNRWA deployed telemedicine and mental telehealth services at short notice and the need to evaluate these new modes of remote service delivery is essential. The use of a hybrid approach, a combination of online and face-to-face therapy, could be useful as a long-term solution.