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The title complex, [Co(C12H10N6)2(H2O)2](C8H4NO6)2, is composed of a mononuclear cobalt(II) cation and two 3-carboxy-5-nitrobenzoate anions for charge balance. In the cation, the CoII atom is six-coordinated in a distorted octahedral geometry. It bonds to two O atoms of two water molecules, and two pairs of N atoms from two 4-amino-3,5-bis(2-pyridyl)-4H-1,2,4-triazole molecules, which behave as bidentate chelating ligands. There are intramolecular N—H...N hydrogen bonds in the cation. In the crystal, there are a number of intermolecular N—H...O and O—H...O hydrogen bonds, as well as intermolecular π–π stacking interactions [centroid–centroid distances = 3.657 (2) and 3.847 (2) Å], that link the molecules into two-dimensional networks lying parallel to the ab plane. The presence of C—H...O interactions leads to the formation of a three-dimensional network.