Dielectric response of Ba_0.95Pb_0.05TiO₃ ceramics doped with 0.1 and 1 wt.% of Co₂O₃, synthesized by conventional high-temperature method, was studied in wide temperature and frequency range. The temperature dependences of the real and the imaginary parts of dielectric permittivity of the ceramics were compared with those of BaTiO₃ and Ba_0.95Pb_0.05TiO_3. The addition of Co³⁺ ions results in a broadening of dielectric anomalies related to the transition to paraelectric cubic phase, and the structural transition between the tetragonal and the orthorhombic phases. At low temperatures (125–200 K) the dielectric absorption of Co-doped Ba_0.95Pb_0.05TiO₃ ceramics was found to exhibit relaxor-like properties. The dielectric response has been found to contain the contributions characteristic of fluctuations of the polar nanoregion boundaries and reorientations of the dipole moments between allowed directions in the nanoregions in the rhombohedral and the orthorhombic phases. The behavior speaks in favor of ordering of polar defects in the host lattice of Ba_0.95Pb_0.05TiO₃ in a form polar nanoregions_.