Solid-liquid phase equilibria were determined at 298.15 K for some aliphatic alcohol + cesium sulfate + water systems. The alcohols used were methanol, ethanol, I.-propanol, and 2-propanol. Measurement of the I-propanol + cesium sulfate + water system was also made at 308.15 K and 318.15 K. The binodal curves were correlated using a five-parameter equation, and tie lines were correlated with the Othmer-Tobias and Bancroft equations. Samples of the solid phase analyzed by thermogravimetric analysis show that it was an anhydrous salt. The refractive index of the liquid phase was also determined.