The zinc copper ferrite nanoparticles were synthesized via hydrothermal method. Further, the X-ray diffraction patterns confirmed the formation of cubic spinel structure. The microstructure was analyzed using the FESEM and TEM study. The results revealed that the symmetrical and asymmetrical nanospheres were found in the surface morphology. The dielectric studies indicated that the behavior of dielectric constant and dielectric loss as a function of frequency and composition. In addition, the Maxwell-Wagner interfacial polarization was observed. Similarly, the ac-electrical conductivity behavior was well understood. The M-H loops indicated the ferromagnetic behavior of ZnCu ferrite samples.