CreelCat is a collection of creel and angler survey data from over 40 states as well as Washington DC and Puerto Rico. Inland recreational fishing, defined as primarily leisure-driven fishing in freshwaters, is a popular past-time in the USA. State natural resource agencies endeavor to provide high-quality and sustainable fishing opportunities for anglers. Managers often use creel and other angler survey data to inform state- and waterbody-level management efforts. CreelCat aims to provide access to the data and tools necessary to both bridge the gap between state and regional/national efforts, while providing managers and decision-makers with a variety of tools to aid the conservation and management of recreational fisheries.