Isothermal vapor-liquid equilibrium data were measured for two binary systems, 2-methylpentane + 2-methyl-2-propanol and 2-methylpentane + 2-butanol at 329 K. The measurements were made with a recirculation still and the composition of liquid and condensed vapor phase was analyzed with a gas chromatograph, Both systems measured indicate positive deviations from Raoult's law and exhibit azeotropic behavior. The pure component vapor pressure of 2-methylpentane was also measured.