In the centrosymmetric binuclear title complex, [Co(2)(C(11)H(14)NO(2))(4)(C(10)H(14)N(2)O)(2)], the two Co(II) cations [Co⋯Co = 2.6199 (5) Å] are bridged by four 4-(diethyl-amino)-benzoate (DEAB) anions. The four nearest O atoms around each Co(II) ion form a distorted square-planar arrangement, the distorted square-pyramidal coordination geometry being completed by the pyridine N atom of an N,N-diethyl-nicotinamide (DENA) ligand. The dihedral angle between the benzene ring and the carboxyl-ate group is 7.06 (11)° in one of the independent DEAB ligands and 4.42 (9)° in the other. The benzene rings of the two independent DEAB ligands are oriented at a dihedral angle of 86.35 (8)°. The pyridine ring is oriented at dihedral angles of 31.43 (6) and 57.92 (7)° with respect to the two benzene rings. In the crystal, weak inter-molecular C-H⋯O inter-actions link the mol-ecules into a three-dimensional network. Weak C-H⋯π inter-actions are also present in the crystal structure.