In the centrosymmetric binuclear title complex, [Co-2(C11H14-NO2)(4)(C10H14N2O)(2)], the two Co-II cations [Co center dot center dot center dot Co = 2.6199 (5) angstrom] are bridged by four 4-(diethylamino)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-diethylnicotinamide (DENA) ligand. The dihedral angle between the benzene ring and the carboxylate group is 7.06 (11)degrees in one of the independent DEAB ligands and 4.42 (9)degrees in the other. The benzene rings of the two independent DEAB ligands are oriented at a dihedral angle of 86.35 (8)degrees. The pyridine ring is oriented at dihedral angles of 31.43 (6) and 57.92 (7)degrees with respect to the two benzene rings. In the crystal, weak intermolecular C-H center dot center dot center dot O interactions link the molecules into a three-dimensional network. Weak C-H center dot center dot center dot pi interactions are also present in the crystal structure.