In this work, densities, speeds of sound, and refractive indices of 12 binary systems of cycloalkanes with aromatics (cyclopentane (1), or cyclohexane (1), or methylcyclohexane (1) + benzene (2), + toluene (2), + ethylbenzene (2)) at T = 313.15 K and at atmospheric pressure were determined over the whole composition range. From the experimental results, the excess properties (excess molar volumes, isentropic compression, excess molar isentropic compression, and refractive deviations) at T = 313.15 K of all studied binary systems were calculated and satisfactorily fitted to the Redlich-Kister equation.