Layered organic-inorganic hybrid Zinc iodide complex were synthesized by reactions in solution. The studies of layered organic-inorganic hybrid materials are very interesting due to their unique electronic structure, electrical and mechanical properties. The mechanical properties of crystals are evaluated by mechanical testing which reveals certain mechanical characteristics. The Vickers hardness number (Hv) was found to increase with load. The Meyer's index number 'n' was calculated from Hv. The frequency dependent dielectric properties of title compound are studied by measuring dielectric constant, dielectric loss and conductivity at different temperatures in the frequency range of 50Hz - 5MHz. The value of dielectric constant and dielectric loss decreases with frequency increases are attributed to Maxwell- Wagner type interfacial polarization.