The isothermal vapor-liquid(-liquid) equilibria for the water + cyclohexane + cyclohexanol, water + toluene + cyclohexanol, and water + cyclohexylamine + cyclohexanol ternary systems are presented. The experimental data were determined by the dynamic method in a modified Rock and Sieg circulation still between 333.15 and 363.15 K at reduced pressures. The experimental results were compared with the predictions from both UNIQUAC and NRTL activity coefficient models and the equation of state proposed by Elliott, Suresh, and Donohue (ESD EOS).