Isobaric vapor-liquid equilibnum (VLE) data have been measured at 101.3 kPa for the binary mixtures containing (propyl acetate + n-pentanol), (propyl acetate + 1-methyl-1-butanol), and (propyl acetate + 3-methyl-1-butanol) using an equilibrium still. The thermodynamic consistency of the experimental data was tested by semiempirical methods of Herington and was satisfactory. The activity coefficients were correlated with the NRTL, Wilson, and UNIQUAC models, and the NRTL model indicates slightly better results than the other two models in these three binary systems.