In the title complex, [Ni(C7H3NO4)(C15H11N3)]·C3H7NO·H2O, the NiII ion is six-coordinated within an octahedral geometry defined by three N atoms of the 2,2′:6′,2′′-terpyridine ligand, and two O atoms and the N atom of the pyridine-2,6-dicarboxylate di-anion. In the crystal, the complex molecules are stacked in columns parallel to the a axis being connected by π–π stacking [closest inter-centroid separation between pyridyl rings = 3.669 (3) Å]. The connections between columns and solvent molecules to sustain a three-dimensional architecture are of the type water-O—H...O(carbonyl) and pyridyl-, methyl-C—H...O(carbonyl).