The densities of (lithium, magnesium, and copper(II)) sulfates + ethanol + water mixtures have been measured with an oscillating-tube densimeter in the temperature range of (283.15 to 298.15) K and at atmospheric pressure. An empirical correlation for the densities of ternary mixtures has been used to correlate experimental values as a function of the molality of the salt and solvent composition. Data fitting show a good agreement with experimental values.