Excess molar enthalpies H-m(E) were measured as a function of mole fraction at 298.15 K and atmospheric pressure for the eight mixtures chlorocyclohexane or methylcyclohexane + methanol, ethanol, propan-1-ol, or propan-2-ol. The results are compared to H-m(E) for cyclohexane + methanol, ethanol, propan-1-ol, or propan-2-ol, and the effect of the chloro and methyl groups is noted.