Densities and viscosities for heptane + 1-pentanol, +1-hexanol, +1-heptanol, +1-octanol, +1-decanol, and +1-dodecanol are reported at (298.15 K and 308.15) K. The viscosity deviations were calculated. The mixture viscosity data were fitted to the semiempirical equations of Grunberg−Nissan, Heric, McAllister, and Auslander.