This report was developed as part of SEA circular – Reducing marine litter by addressing the management of the plastic value chain in South-East Asia’ a project jointly implemented by the United Nations Environment Programme (UNEP) and the Coordinating Body on the Seas of East Asia (COBSEA), with funding from the Government of Sweden. This National Source Inventory (NSI) report identifies sources of available data and knowledge related to marine litter in the Philippines, to inform evidence-based planning to address plastic pollution and marine litter at the national level, in line with regional and global frameworks. This document includes information up to the end of 2022.