The title compound, [Co(CH3COO)2(CH4N2S)2], is isotypic with the corresponding Zn(II) complex. The metal atom is in a distorted tetra-hedral coordination environment with the two S atoms from two thio-urea ligands and two O atoms from two acetate anions as the coordinating atoms. All H atoms of the thio-urea ligands are involved in N-H⋯O and N-H⋯S hydrogen bonds, leading to a three-dimensional network.