The Marine Energy Atlas is an interactive mapping tool and knowledge hub that stores geospatial information related to marine energy. The Marine Energy Atlas allows users to easily visualize, analyze, and download geospatial datasets relevant to marine energy. This open-access, interactive platform allows users to map U.S. wave, tidal, riverine current, ocean current, and ocean thermal resources to explore potential for marine energy projects. It supports everything from project siting to device design through high-resolution and spatially comprehensive data sets. In addition to using the in-app analytical tools, data can be downloaded for offline analysis.