In the title compound, [Zn(C(8)H(4)O(7)S)(C(12)H(9)N(3))(2)]·H(2)O, the Zn(II) atom has a distorted octa-hedral coordination geometry, defined by four N atoms from two 2-(2-pyrid-yl)-1H-benzimidazole ligands and two O atoms from a deprotonated carboxyl-ate group of the 3-carb-oxy-5-sulfonatobenzoate ligand. In the crystal structure, the complex mol-ecules are linked into a three-dimensional network by inter-molecular O-H⋯O and N-H⋯O hydrogen bonds, and π-π stacking inter-actions with centroid-centroid separations of 3.758 (2) and 3.597 (1) Å.