This report serves as the workshop proceedings of the H2@Ports Workshop held by the U.S. Department of Energy (DOE) Fuel Cell Technologies Office, the U.S. Department of Transportation (DOT) Maritime Administration (MARAD), and the European Union Fuel Cells and Hydrogen Joint Undertaking (FCH JU) on September 10-12, 2019 at the Marines? Memorial Club & Hotel in San Francisco, CA. The Workshop was held to identify opportunities, barriers to adoption, and research needs to accelerate technology development and industry commercialization of hydrogen and fuel cell systems in maritime applications. Experts and stakeholders from industry, government, and academia met to discuss the current state-of-the-art of hydrogen and fuel cell technologies and the requirements for using these technologies in port-side and ship-board maritime applications. This report summarizes the discussions and diverse opinions expressed at the Workshop.