In the title complex, [Co(C7H4ClO2)2(C6H6N2O)2(H2O)2], the Co(II) cation is located on an inversion center and is coord-inated by two 2-chloro-benzoate anions, two nicotin-amide (NA) ligands and two water mol-ecules. The four O atoms in the equatorial plane around the Co(II) cation form a slightly distorted square-planar arrangement, while the slightly distorted octa-hedral coordination is completed by the two pyridine N atoms of the NA ligands in the axial positions. The dihedral angle between the carboxyl-ate group and the adjacent benzene ring is 29.7 (4)°, while the pyridine and benzene rings are oriented at a dihedral angle of 83.17 (15)°. Intra-molecular O-H⋯O hydrogen bonding occurs between the carboxyl-ate group and coordinating water mol-ecule. In the crystal, inter-molecular N-H⋯O, O-H⋯O and weak C-H⋯O hydrogen bonds link the mol-ecules into a three-dimensional network.