With an aim of discovering new useful materials KDP single crystals added with potassium dichromate (K2Cr2O7) in six different molecular ratios have been grown from respective aqueous solutions by the free evaporation method. Dielectric measurements were carried out on all the six grown crystals with a fixed frequency of 1kHz at various temperatures ranging from 50-150°C along a- and c- directions by using the parallel plate capacitor method . The chromium atom content determined through AAS method confirms the presence of chromate ion in the crystal. The present study indicates that the dielectric parameters increase with the increase in temperature, but do not vary systematically with respect to impurity concentration. Also it indicates that 0.4 mole% dichromate addition to KDP leads to low er value dielectrics.