In the title compound, [CuCl(C(7)H(7)O(3)S)(C(12)H(8)N(2))(H(2)O)], the central Cu atom is coordinated by a water molecule, a chloride ion, an O-monodentate p-toluenesulfonate anion and an N,N'-bidentate 1,10-phenanthroline ligand. The copper environment is best described as a slightly distorted square pyramid, with bond distances Cu-Cl 2.2282 (9) A, Cu-OW 1.984 (3) A, and Cu-N 2.006 (3) and 2.028 (3) A; the apical Cu-O distance is 2.281 (2) A. In the supramolecular structure, pi-pi-stacking stabilization is observed, and classical and non-classical hydrogen bonds also play an important role.