Three kinds of bridging ligands, 4,4′-oxydibenzoate, 4-(4-carboxyphenoxy)benzoate and 3-(pyridin-4-yl)-5-(pyridin-3-yl)-1H-1,2,4-triazole, link the CdII cations to form the title polymeric complex, [Cd2(C14H8O5)(C14H9O5)2(C12H9N5)2]n, in which each CdII cation is in a distorted N2O5 pentagonal–bipyramidal coordination geometry. The 4,4′-oxydibenzoate dianion exhibits point group symmetry 2, with the central O atom located on a twofold rotation axis. Classical N—H...O, O—H...N hydrogen bonds and weak C—H...O hydrogen bonds link the complex molecules into a three-dimensional supramolecular architecture. A solvent-accessible void of 53 (2) Å3 is observed, but no solvent molecule could reasonably located there.