Electropolymerization of bithiophene-substituted cadmium(II) Schiff base complexes forms thin conducting metallopolymer films with metal centers distributed throughout. The metal centers act as seed points for direct growth of US nanoparticles within the polymer matrix under mild reaction conditions. This synthetic approach offers control over both the size and distribution density of the nanoparticles formed within the polymer film. The resulting hybrid materials hold promise for a variety of organic electronic and optoelectronic applications.