Recognizing the importance that green infrastructure (GI) plays in sustaining ecosystem services such water resources conservation, flood and stormwater management, groundwater recharge, water supply, and disaster resilience, the United States Agency for International Development (USAID) has identified the need for guidance in planning and design of GI solutions. This resource guide is aimed at providing USAID practitioners involved in the planning and development of sustainable infrastructure projects with a better understanding of GI and identifying GI interventions that can be integrated into USAID projects.