In the title mol-ecule, C(10)H(7)ClO(3), the butyrolactone core, a furan-2(5H)-one, forms a dihedral angle of 59.21 (5)° with the benzene ring. In the crystal, two types of hydrogen bonds (O-H⋯O and C-H⋯Cl) link mol-ecules into infinite chains along the b axis. π-π contacts [centroid-centroid distances = 3.6359 (10) and 3.8776 (11) Å] link the chains into a three-dimensional network.