The molecule of the title compound, C7H6ClNO2, is almost planar, with a dihedral angle of 3.34 (14)° between the COOMe group and the aromatic ring. In the crystal, the molecules are arranged into (12) layers by C—H⋯N hydrogen bonds and there are π–π stacking interactions between the aromatic rings in adjacent layers [centroid–centroid distance 3.8721 (4) Å]