Frequent and proper handwashing with soap is vital to prevent the spread of COVID-19. In response, the Sanitation Learning Hub at the Institute of Development Studies has developed this Handwashing Compendium for Low Resource Settings. Bringing existing information from different organisations into one place, the compendium provides guidance, local examples of and further resources on accessible low-cost handwashing facilities, environmental cues and physically distanced hygiene promotion. The compendium is a living document which will be updated regularly as learning emerges. It has been developed and disseminated quickly so immediate, relevant and timely actions can be taken. Please share feedback and contributions via email (SLH@ids.ac.uk) or Twitter (@SanLearningHub). For those with limited internet access, individual sections of the compendium can also be sent upon request. PLEASE NOTE: This edition is current, and replaces Editions 1 and 2. See the link under "More details" below. An Arabic translation of Edition 3 will be available to download soon. A French translation of Edition 3 will be available to download soon. A Portuguese translation of Edition 3 will be available to download soon.