The chemical method was employed for the preparation of barium doped cobalt (Co_1-xBa_xFe₂O₄) . Different concentrations of barium were doped in cobalt “CoFe₂O_4” to get Co_1-xBa_xFe₂O₄; x = 0, 0.25, 0.50, 0.75 and 1.0 . X-ray diffraction (XRD) spectroscopy was employed for the analysis of crystallographic structure and Debye-Scherrer formula was employed for the determination of average size. The morphological study and size calculation of Co_1-xBa_xFe₂O₄ were carried out by using scanning electron microscopy (SEM). Energy X-ray (EDX) spectroscopy was used for the analysis of these . The modes of different atoms present in these were investigated using Fourier transform infrared (FTIR) spectroscopy. The dielectric parameters such as capacitance, real and imaginary parts of dielectric constant, loss tangent and ac-conductivity were inspected using LCR meter. Significant improvement in charge storage and transport properties were achieved with the doping of barium in CoFe₂O₄ .