Relative permittivities, speeds of sound, viscosities, and densities for the binary mixtures of cyclohexanone + cis-decalin and cyclohexanone + trans-decalin have been measured over the whole composition range at (283.15, 293.15, and 303.15) K. The excess volumes and the deviations in viscosity, speed of sound, isentropic compressibility, and molar polarization were calculated. The results were fitted to a Redlich-Kister type polynomial equation, and the corresponding parameters have been derived. The Kirkwood correlation factor was also calculated.