Densities, speeds of sound, and refractive indices of binary systems containing cycloalkanes (cyclohexane and methylcyclohexane) with aromatic compounds (benzene, toluene, and ethylbenzene) at T = (283.15 and 298.15) K and cyclo-octane with aromatic compounds at T = 298.15 K under atmospheric pressure were determined over the whole composition range. From the experimental results, the derived and excess properties (excess rnolar volumes, isentropic compression, excess molar isentropic compressibility, and refractive index deviations) at T = (283.15 and 298.15) K were calculated and satisfactorily fitted to the Redlich-Kister equation.