The title compound, [Cu(ClO4)(C5H6N2)(2)(C12H12N2)] ClO4, was prepared by in situ partial ligand substitution between 3-aminopyridine and 4,4'-dimethyl-2, 20-bipyridine at room temperature. The central copper(II) ion is five-coordinated by one bidentate 4,4'-dimethyl-2,2'-bipyridine molecule, two monodentate pyridine-coordinated 3-aminopyridine molecules and one apical O atom from the perchlorate counterion. Intermolecular N-(HO)-O-... and C-(HO)-O-... hydrogen-bonding interactions form a hydrogen-bond-sustained network.