Isobaric vapor-liquid equilibrium measurements at 101.3 kPa ape reported fbr the binary systems methylcyclohexane + I-propanol, + 2-propanol, + I-butanol, and + 2-butanol. The systems show a strong positive deviation from ideality and present a minimum temperature azeotrope, The activity coefficients were found to be thermodynamically consistent by the methods of Van Ness-Byer-Gibbs and Wisniak. The date were correlated with five liquid-phase activity coefficient models (Margules, Van Laar, Wilson, NRTL, and UNIQUAC). According to the average deviations in temperature and in vapor composition the best model for the systems is NRTL.