In the title mononuclear complex, [CoCl(2)(C(11)H(11)N(5))(2)], the Co(II) atom is four-coordinated by two ligand N atoms and two Cl atoms in a distorted tetra-hedral geometry. In the crystal, mol-ecules are stacked through π-π inter-actions [centroid-centroid distances = 3.473 (2), 3.807 (3), 3.883 (2) and 3.676 (2) Å], forming a three-dimensional supra-molecular network.