The experimental vapor-liquid equilibrium data for three binary systems of acetone+ 1-butanol, ethanol+ 1-butanol, acetone+ ethanol and a ternary system of ethanol+ acetone+ 1-butanol at atmospheric pressure were measured using an ebulliometer. The binary experimental data were correlated using the Wilson, NRTL, and UNIQUAC models to obtain the binary interaction parameters of the models. These parameters were used to predict the ternary equilibrium data. The average absolute deviations of temperature (AAD T) between the experimental and correlation data of the three models are the same, 0.63, for the acetone+ 1-butanol system, 0.72, 0.65, and 0.70, for the ethanol+ 1-butanol system, and 0.15, 0.30, and 0.19, for the acetone+ ethanol system, respectively. The AAD T values for the ternary system of ethanol+ acetone+ 1-butanol by comparing the experimental data with the data calculated using the three models were 0.28, 0.56, and 0.67, respectively.