The tiltle complex, [La2(C7H7NO2)4Cl2(H2O)6]Cl4·2H2O, is a centrosymmetric dimer formed by edge-sharing LaO5(H2O)3Cl polyhedra linked together by a carboxylate ligand. The two LaIII metal ions are linked by two bidentate bridging carboxylate groups with a κ2
O:O′ coordination mode and two bidentate chelating bridging carboxylate groups with a κ3
O:O,O′ coordination mode. The coordination sphere of lanthanum, completed by a terminal chloride and three water molecules, adopts a distorted tricapped trigonal–prismatic arrangement. N—H⋯Cl, N—H⋯O and O—Hwater⋯Cl hydrogen bonds, and slipped π–π interactions between parallel benzene rings [centroid–centroid distance of 3.647 (3) Å] are observed in the structure. These combine to stabilize a three-dimensional network