Liquid-liquid equilibrium (LLE) data for the ternary systems water + 2-butanol + methyl methacrylate, butyl metbacrylate, and isobutyl methacrylate were determined at atmospheric pressure and at (288.2 and 318.2) K. The reliability of the experimental tie-line data was determined through the Bachman plots. The experimental data were also compared with the values correlated by the NRTL and UNIQUAC models. Good quantitative agreement was obtained with these models. In general, the average deviations from the UNIQUAC model are slightly smaller than those from the NRTL model.