The NCEI Marine Microplastics product provides access to aggregated global data on microplastics in marine settings. The information is used to improve water quality and protect the ecosystem, especially coastal ecological habitats such as salt marshes and mangrove forests that help recycle nutrients, serve as breeding grounds for fingerlings, and permanent homes for oysters and other coastal marine wildlife. This product can also be used to validate remote sensing technologies that identify and characterize microplastics from space. In the long-run, this geodatabase can help guide society’s strategies for mitigating microplastics in the marine environment. This product is a publicly available collection of marine microplastics data from around the world. The database is a repository for multiple datasets of marine microplastics. The data are aggregated, archived, and accessible to users in a consistent and reliable manner. Contributors from various research cruises and field work provide the data. This is a growing database and data collectors are encouraged to submit findings to NCEI to be added to the Marine Microplastics application.