Liquid-liquid equilibrium (LLE) data for the systems water + 2-propanol + methyl methacrylate, butyl methacrylate, and isobutyl methacrylate were determined at atmospheric pressure over temperatures of 288.15 K and 318.15 K. From these new LLE data, we can find that very small amounts of the organic compounds were found in the aqueous phase, and water dissolved appreciably in the organic-rich phase, especially near the plait point. The reliability of the experimental tie-line data was determined through the Othmer-Tobias and 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 NRTL model are slightly smaller than those from the UNIQUAC model.