Vapor pressures of (1-bromobutane + 2-methyl-1-propanol or 2-butanol) at 10 temperatures between (278.15 and 323.15) K were measured by a static method. Excess molar enthalpies and volumes were also measured at 298.15 K. The reduction of the vapor pressures to obtain activity coefficients and excess molar Gibbs energies was carried out by fitting the vapor pressure data to the Wilson equation according to Barker's method. Azeotropic mixtures with a minimum boiling temperature were observed over the whole temperature range.