The title Co(II) complex, [Co(C(9)H(10)NO(2))(2)(C(10)H(14)N(2)O)(2)(H(2)O)(2)], is centrosymmetric. It contains two dimethyl-amino-benzoate (DMAB) and two diethyl-nicotinamide (DENA) ligands and two water mol-ecules, all of them being monodentate. The four O atoms in the equatorial plane around the Co atom form a slightly distorted square-planar arrangement, while the slightly distorted octa-hedral coordination is completed by the two pyridine N atoms of DENA ligands with the Co-N distance of 2.1519 (11) Å in the axial positions. The Co atom is displaced out of the least-squares plane of the carboxyl-ate group by -0.781 (1) Å. The dihedral angle between the carboxyl-ate group and the adjacent benzene ring is 5.05 (7)°, while the pyridine and benzene rings are oriented at a dihedral angle of 71.48 (5)°. In the crystal structure, inter-molecular O-H⋯O and C-H⋯O hydrogen bonds link the mol-ecules into a three-dimensional network. Two weak C-H⋯π inter-actions are also present.