The GPM Ground Validation Iowa Flood Center (IFC) Rain Gauges IFloodS dataset was collected during the Iowa Flood Studies (IFloodS) field campaign from April 28, 2013 through May 20, 2013 near Shueyville City, Iowa. Four observation sites (15442, 15443, 15444, and 22390), each consisting of three tipping bucket rain gauges that collected 5-minute accumulations of precipitation data. The main goal of IFloodS was to evaluate how well the GPM satellite rainfall data can be used for flood forecasting. Specifically, this meant collecting detailed measurements of precipitation at the Earth’s surface using ground instruments and advanced weather radars while simultaneously collecting data from satellites passing overhead. These IFC Rain Gauge data are available in ASCII format, with corresponding browse images available in PNG format.