In the title compound, [Fe(SO4)(C10H7N3S)2(H2O)], the FeII cation is sixfold coordinated by four N atoms from two 2-(1,3-thiazol-4-yl)-1H-benzimidazole ligands, one water O atom and one O atom of the sulfate dianion within a slightly distorted octahedral geometry. The cations and anions are connected by N—H...O and O—H...O hydrogen bonds into layers in the ab plane.
