New experimental data on densities, viscosities, and relative permittivities for pentane + methanol, + 1-propanol, + 1-butanol, + 1-pentanol, + 1-hexanol, + 1-heptanol, + 1-octanol, + 1-decanol, and + 1-dodecanol are reported at 298.15 K. The molar and orientation polarizations were obtained by combining relative permittivity and molar volume data. The excess volumes and deviations in relative permittivities and molar and orientation polarizations were also calculated. The viscosities of all the mixtures were also correlated by Grunberg-Nissan, McAllister, and Auslander equations. The correlation factor, g(K), was derived from the relative permittivity data over the whole 1-alcohol mole fraction range for all the mixtures.