The water-dispersed polyurethane composition of the present invention comprises a polyisocyanate component (a), a polyol component (b), and water as the essential components, wherein, at least, an isocyanate compound represented by general formula (I) below is used as the polyisocyanate component (a). The water-dispersed polyurethane composition of the present invention is excellent in adhesiveness, water resistance, corrosion resistance, heat resistance, weather resistance, water repellency, oil repellency, and the like, and can be suitably used as paint for surface-treated steel plates. wherein R, represents an alkyl group having 10 to 30 carbon atoms, R 2 represents -N=C=O or -NH-C(=O)-C-O- R 1 , and A represents a residue other than two -N=C=O groups derived from a diisocyanate.A water-dispersed polyurethane composition essentially containing a polyisocyanate component (a), a polyol component (b) and water is characterized in that at least an isocyanate compound represented by the general formula (I) below is used as the polyisocyanate component (a). Such a water-dispersed polyurethane composition is excellent in adhesiveness, water resistance, corrosion resistance, heat resistance, weather resistance, water repellency, oil repellency and the like, and can be preferably used as a coating composition for surface-treated steel sheets. (In the formula, R