This digital spatial data set provides information on the spatial distribution of potential runoff-contributing areas in the State of Kansas. Potential runoff-contributing areas were estimated collectively for the processes of infiltration-excess overland flow and saturation-excess overland flow. For infiltration-excess overland flow, various rainfall-intensity and soil-permeability values were used. For saturation-excess overland flow, antecedent soil-moisture conditions and a topographic wetness index were used. The digital data sets used in the analysis included 1:24,000-scale soils data and a 100-meter-resolution digital elevation model. The data set of potential runoff-contributing areas is in grid (raster) format with a grid-cell size of 10,000 square meters.