The stability of nanosized Ni dispersions with varying concentrations of poly (1-vinyl-2-pyrrolidone) (PVP) was investigated by means of a visual inspection, transmission profile measured by Turbiscan, zeta potential, and transmission electron microscopy. For dispersions with PVP, the zeta potential values varied from positive charge to negative charge. For dispersion with a 0.04 weight percentage of PVP, the zeta potential value showed 31.71 mV, which was the highest value, and the flocculation of Ni nanoparticles was not observed. Stable dispersions of Ni nanoparticles were produced by electrostatic, steric interactions, and the formation of bridging aggregation.